After their parents were killed in a mysterious car accident, Emily and her younger siblings moved to a small Louisiana town. Soon strange things start to happen, giving the siblings the feeling that they're being watched.

Cold Moon takes place in tiny Babylon, Fla., where the granddaughter of Clark’s character is murdered by a mysterious assailant, her body sunk into the black waters of the Styx River — the river where her parents disappeared from their boat a decade earlier. Suspicion falls on a duplicitous banker and his wealthy father, played by Stewart and Lloyd.