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Four strangers wake up in a locked room. One of them is a killer. They have 24 hours to figure out who.

Retired detective Frank Morrison thought he was done with murder. Then the cold case that ended his career resurfaces—and the killer is still out there, watching.
Some doors should stay locked.
A paranormal investigator takes on her most dangerous case yet: an asylum where the dead still scream.
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Everyone in Cedar Falls has a secret.
Twenty years after a girl vanished from a small town, her daughter comes back to find the truth.