In a run-down apartment complex in Hollywood, young Samantha is brutally kidnapped by a masked assailant known as The Toolbox Killer. As she regains consciousness, she finds herself trapped in a labyrinthine, decrepit warehouse filled with torturous devices and macabre remnants of past victims. Desperate to survive, she tries to decipher the layout of the ominous building and the mind of her sadistic captor while enduring psychological and physical torment.

Simultaneously, two detectives are on the trail of The Toolbox Killer, driven by their own personal vendettas and haunted by past failures. Their investigation leads them through a tangled web of clues, including cryptic symbols and blood-soaked crime scenes, each revealing the psychopath's escalating violence. The tension escalates as Samantha's willpower is tested, pushing her to the edge of human endurance while she searches for a way to escape her nightmarish prison before it's too late.