Lana is a 57-year-old real estate executive from Southern California. A self-reliant and fashionable woman, she usually commands authority and maintains strict control over her professional and personal life. After receiving a cancer diagnosis, she moves in with her estranged daughter and granddaughter in Elkhorn Slough. Stripped of her usual power, she begins investigating a local murder to regain a sense of purpose and relevance.

Beth is a practical nurse in her early thirties who lives on a piece of coastal property in Elkhorn Slough. She raised her daughter independently after a severe falling out with her mother over an unplanned teenage pregnancy. She values stability and has built a peaceful, self-sufficient life that faces immediate disruption when she takes her ailing mother into her home. She struggles with residual resentment while honoring her duty to provide medical care for her family.

Jack is a responsible 15-year-old girl who gives kayak tours on the local waterways. She is highly knowledgeable about the slough and deeply connected to her rural community. She becomes an early suspect in a murder investigation when a dead body is linked to a rowdy bachelor party that took her tour. She possesses a natural bravery that often puts her at odds with her mother's protective instincts.

Diana is a wealthy, stylish woman who frequently spent time with her ailing father prior to his death. She dreams of turning the family's expansive ranch into a wellness spa. She harbors personal grief from the loss of a former fiancé, a tragedy that makes her hesitant to draw attention to herself during the murder investigation.

Martin is a successful entrepreneur in the nanotech industry who struggles with a deeply strained relationship with his family. His father historically valued practical farming skills over Martin's academic achievements, creating decades of resentment. He hopes to sell his family's property to fund a startup venture, putting him at odds with others who want to preserve the land.

Detective Ramirez is the first Latina detective in her county assigned to a murder investigation. She is determined to succeed and prove her capabilities in a challenging, prejudiced professional environment. She carefully manages her overbearing partner while attempting to conduct a fair and thorough investigation into the local deaths.

Detective Nicoletti is an arrogant and dismissive law enforcement officer leading the local murder investigation. He frequently relies on intimidation tactics and jumps to immediate conclusions, completely disregarding evidence that contradicts his initial theories. His prejudiced behavior severely hampers the effectiveness of the police investigation.

Ricardo is a dedicated naturalist working for a local land trust in Elkhorn. He is highly respected in the community and holds a deep desire to protect the land for future generations while also helping disadvantaged entrepreneurs. His unexpected death sets the story's events into motion.

Hal is an elderly, traditional landowner who recently suffered a series of strokes. He owns a massive estate that borders the slough, making his land highly sought after by conservationists and developers alike. His death initially appears to be from natural causes, but suspicious details rapidly emerge regarding his final days.

Victor is a conservationist who works for the Central Coast Land Trust. He is passionate about preserving the local wetlands and works aggressively to convince major landowners to partner with his organization to protect the environment. His intense focus on land acquisition makes him a person of interest to amateur investigators.

Paul is the owner of the Kayak Shack and Jack's primary employer. He maintains a nervous, defensive demeanor when speaking to the police and engages in off-the-books agricultural projects that draw immediate suspicion from investigators looking for a motive in the local murders.

Scotty is a local resident who is close friends with Paul Hanley. He is quietly involved in underground agricultural projects and helps Paul maintain order around the edges of the slough, far away from the eyes of law enforcement.

Ari is Lana's former husband who abandoned his family years prior to the events of the story. His sudden departure left his wife and young daughter with very few resources, completely altering the trajectory of their lives and driving his former wife's obsession with financial independence.

Sofia is a deceased woman who previously lived and worked on the expansive farming estate. She raised her son on the property before passing away in a tragic barn fire, leaving a lasting impact on the surviving members of the community.