In the middle of Chickasha, Oklahoma, Bree hosts a popular podcast dedicated to uncovering unsolved mysteries, drawing listeners in with stories of real-life puzzles. However, when she starts receiving strange phone calls, a threatening voice hints at a connection between the mysteries she investigates and a past she'd rather forget. Bree, known for her sharp instincts and relentless curiosity, soon finds herself at the center of a chilling puzzle-one that threatens to destroy her carefully guarded life.

The arrival of cassette tapes on her doorstep marks a disturbing turn, each reel containing unsettling messages and pieces of a history she has tried to leave behind. When the tapes begin appearing inside her home, Bree realizes she's not just being watched-someone has invaded her most private space. As the messages grow more personal and the warnings become more threatening, she is forced to confront the painful truths she's buried. With danger closing in, Bree must hurry to uncover the identity of the person who has been harassing her before the past she's been running from finally catches up to her-this time, with deadly consequences.