The Ferryman's Daughter Themes
by Yasmin Angoe
The Ferryman's Daughter is really about how the past refuses to stay buried. Sanaa carries her father's crimes in her blood and name, hides who she is, and watches old trauma return through nightmares and places she thought she had left behind. The murders, the watching, and the betrayals all ask whether she can escape what she inherited.
On this page, you'll find theme breakdowns of legacy and identity, secrets and lies, resurfacing trauma, ritual murder, surveillance and paranoia, and trust and betrayal, each tied to concrete moments from the book. You'll also see how pennies, rope bows, water, and storms work as recurring symbols that shape the story's meaning.
Major Themes in The Ferryman's Daughter
Inherited legacy and identity as the Ferryman's daughter
The book ties Sanaa to her father's crimes through blood, public identity, and the killer's own language of inheritance. She changes her name and hides her past, but the murders force her to confront whether she is merely the Ferryman's daughter or something else. The ending explicitly frames her as either victim or heir.
- In the prologue, Sanaa reflects that the world will now know her as the Ferryman's daughter and that her darkest secret has cracked open.
- Reaves tells Sanaa the current killer is not a copycat but an inheritor or protégé who is correcting the Ferryman.
- Lily tells Sanaa, 'I'm not punishing you. I'm giving you your legacy,' and says she wants Sanaa to be what Dr. Voss refused to make her.
- At the end, a TV caption reads 'THE FERRYMAN'S DAUGHTER—VICTIM OR HEIR?' and Sanaa asks Detective DeJean whether he believes in inheriting genetics.
Secrets, hidden identity, and lies
Sanaa's life is built on hiding that she is Julian Voss's daughter and on concealing her own role in his death. Her secrecy strains her relationship with Marcus, makes her vulnerable to blackmail, and allows others to manipulate her. The novel repeatedly shows lies eroding trust and forcing Sanaa to choose what to reveal.
- Sanaa lies to Lauryn about a lab glitch and does not reveal she knows the meaning of the pennies and rope.
- Declan threatens to expose Sanaa as Julian Voss's daughter and warns that reporting him would reveal who her father really was.
- Nancy Driscoll blackmails Sanaa after revealing she knows Sanaa is Julian Voss's daughter and accusing her of killing him.
- Aunt Celeste says, 'Secrets rot. They infect everyone who comes in contact with them.'
- Sanaa tells Marcus she is not close to Declan while secretly searching Declan's motel room for the dossier.
Past trauma resurfacing and the buried past
Sanaa's buried past intrudes through nightmares, sensory memories, and flashbacks to her father's bunker and Hannah's death. Objects and places such as dirt, a shovel, the Lakehouse, and pennies force open the mental door she had nailed shut. The novel treats the past as something that cannot stay buried, even when Sanaa decides not to dig up her father's body.
- Sanaa wakes from a nightmare of digging a grave, finds her hands clean, but still imagines dirt under her nails and smells damp earth.
- A dirt-streaked shovel left in her classroom causes Sanaa to have an anxiety attack and flash back to the night she found her father's bunker and killed him.
- In flashback, Sanaa finds Julian Voss strangling Hannah in the bunker and injects him with a prepared syringe.
- At a rest stop, Sanaa decides not to dig up her father's body and thinks, 'Let the grave stay filled. Let the bones stay buried.'
- Sanaa recalls 'Sanaa Voss becoming Sanaa Karrem, stuffing all her hurt and guilt and regret in a compartment and locking it away.'
Ritualistic murder as signature and storytelling
The murders are staged with recurring ritual elements—pennies over eyes, rope bows, water placement—that function as the killer's signature and message. Investigators debate whether the killer is the original Ferryman, a copycat, or an inheritor correcting the ritual. The staging turns the dead into part of a narrative that Sanaa must read.
- In the prologue, the killer places two pennies on the dead woman's closed eyelids as payment for her journey across the River Styx and whispers 'Travel well.'
- Nancy describes the body arranged like it was on an altar, with a rope tied in a bow on the wrist and pennies placed over the eyes.
- Calloway explains the Ferryman used paralytic-sedative injections, left bodies near water, placed pennies over eyes, tied hemp rope in a bow, and took items from victims.
- Reaves says the current killer is an inheritor or protégé who is correcting the Ferryman, and the murders are more violent.
- Leung compares the killer to a bazaar where you get a basket of eggs for services rendered.
Surveillance, targeting, and paranoia
Sanaa is repeatedly watched, tracked, and targeted through anonymous messages, planted objects, and people who seem to know too much. The surveillance makes her feel engineered into someone else's story and extends to her family and colleagues. It culminates in Lily's cat-and-mouse captivity of Marcus and Declan.
- Sanaa receives an anonymous text saying 'Have you missed me?' and later gets another saying 'You're looking in the wrong direction.'
- Nancy Driscoll spies on Sanaa and Declan at school and later lets herself into Sanaa's classroom with a key.
- A lone hooded figure with copper eyes watches Sanaa across the street, and Mrs. Hay says a woman left a girl's bike on the porch and watched the house.
- Sanaa finds a dirt-streaked shovel planted in her classroom and thinks, 'Someone had planted it. Someone with access. Someone still fucking with her.'
- Lily sends Sanaa a photo of Marcus bound and bleeding and texts her to come alone to 2915 Industrial Way.
Betrayal and trust in intimate relationships
Sanaa's closest relationships are strained by secrets and divided between loyalty and duty. Marcus hides evidence and chooses Sanaa over his oath, while Lily, her best friend, is revealed as the killer. The novel shows trust breaking down even as love and loyalty persist.
- Marcus finds a hidden school photo of young Sanaa Voss in Declan's motel room, pockets it, and asks Leung not to log it; Leung warns, 'You're playing with fire.'
- Sanaa suspects her best friend Lily Vale of falsifying evidence after finding recataloged samples and mismatched time stamps in Lily's office.
- Lily is revealed as Lilith Vale, the local medical examiner, Sanaa's former best friend, and the killer.
- Marcus tells Sanaa, 'You lied to me,' and she says she 'just didn't tell you everything'; later he decides he can live with her secret and still loves her.
Symbols and Motifs
Pennies and coins
Pennies are the Ferryman's toll or payment for the journey across the River Styx, and they also act as omens and traces that single Sanaa out. They tie the ritual murders to Sanaa's father, her buried past, and the year her life started over.
- The killer places two pennies on the dead woman's eyelids as payment for the journey across the River Styx.
- Marcus treats the pennies and the year 2007 as a calling card.
- Sanaa spills her tea when she hears about two coins found on the body at Jordan Lake.
- A penny rolls to Sanaa's feet during class; she asks to keep it because it is dated 2007, the year her father died and her life started over.
- Sanaa flashes to a large glass jar filled with pennies in a dimly lit room.
- Pennies are stuffed in the eyes of the new male victim under the highway overpass.
Rope bow or bowknot
The rope tied in a bow is the Ferryman's signature and a kind of trade or offering left with victims. It marks what the killer has taken and serves as a message that investigators and Sanaa must interpret.
- Dani Cho's autopsy finds a rope tied in a bowknot on her left wrist where a watch or tracker should have been.
- Calloway says that in old cases the Ferryman always left a bow and took something.
- A bow is found in Chris Alvarez's backpack, though not on the victim or attached to anything.
- Reaves argues the killer is a deliberate copycat upending the Ferryman's rules.
- In flashback, Sanaa drops the rope tied as a bow into the grave with Julian and Hannah.
Water, rivers, and lakes
Water represents the threshold between life and death and the passage of souls across the River Styx. It is the Ferryman's chosen staging ground, and the killer's use or misuse of water becomes a way to judge whether the ritual is authentic.
- The killer places pennies on the dead woman's eyes as payment for the journey across the River Styx.
- Bodies are found near water, including the woman at Jordan Lake.
- Calloway says the Ferryman left bodies near water.
- Reaves argues Jordan Lake is man-made and stagnant, so the real Ferryman would never choose such dump locations because it violates the ideology of a passage into the afterlife.
- Marcus wakes tied in a flooded chamber, and Declan is trapped in a water-filled pipe or tank.
Storms and thunder
Storms signal foreboding and the approach of violence, but they also become a lesson in preparation. Sanaa's father teaches her that a storm cannot be stopped, only prepared for, and the novel ends with her refusing to flinch.
- In the prologue, thunder rumbles and Sanaa says the worst part of the storm is not here yet.
- Thunder swallows Marcus's footsteps as he leaves for the Jordan Lake body.
- Sanaa recalls her father teaching her to count between lightning and thunder—'You can't stop the storm. But you can prepare for it.'
- At the end, thunder booms as Sanaa exits into the hall, and 'Sanaa Karrem didn't flinch.'