True crime podcaster Trinity Scott is chasing breakout success, and her brand-new serial may get her there. Her subject is Clayton Jay Pelley. More than two decades ago, the respected family man and guidance counselor confessed to the brutal murder of teenage student Leena Rai. But why he killed her has always been a mystery. In a series of exclusive interviews from prison, Clayton discloses to Trinity the truth about what happened that night beneath Devil’s Bridge. It’s not what anyone in the Pacific Northwest town of Twin Falls expects.

Foster sisters Krystal and Nichole have always been there for each other, so when Nichole is committed to a psychiatric hospital after trying to kill her husband, Krystal drops everything to defend her. Scarred by a hard upbringing, Nichole and Krystal managed to construct comfortable lives for themselves. Krystal became a respected lawyer, and Nichole was happily married to an architect - until Nichole starts raving that her husband isn’t her husband, believing that he’s an imposter.

At loose ends after the devastating death of her mother, Una Richardson responds to an advertisement for a ladies’ companion, a position that leads her into the wealthy, secluded world of Mrs. Elspeth McKenzie. But Elspeth's home isn’t the comforting haven it seems. Kathryn, her cold and bitter daughter, resents Una's presence. More disturbing is evidence suggesting two girls lived here before her.

Following a traumatic event in London, Kirsty Woodhouse packs up her family and moves back to her native Wales. There she sets up her new home with her husband and two young daughters, and goes into business with her difficult mother managing a guesthouse in the Brecon Beacons. But when the guesthouse is ready to be occupied, Kirsty encounters the last person she ever expected to see: her estranged cousin Selena. It has been seventeen years since they last talked—when Selena tore everything apart between them. Why has she chosen now to walk back into Kirsty's life?

Whitney had some misgivings when she dropped her increasingly moody teenage daughter, Amelia, off at Lauren’s house. She’d never met the parents, and usually she’d go in, but Amelia clearly wasn’t going to let something so humiliating happen, so instead Whitney waved to her daughter before pulling away from the little house with the roses in front. But when she goes back the next day, an elderly couple answers the door - Amelia and Lauren aren’t there, and this couple swears they never were, that she’s at the wrong house.