MaddieandAbiaretwinsisters,andfamouslytheonlyvictimstoeverescapethenotoriousserialkillerknownasTheMechanic.　　Yearsaftertheirnearescape,TheMechanicisfinallyscheduledtobeexecutedforhishorrificcrimes,butwhatshouldbeamomentofclosureforthesistersendsupunleashingsomethingfarmoreinsidious.Astheytrytoleavebehindthetraumaoftheirexperience,theirconnectiontoTheMechanichauntsthemandbeginstoslowlytakeovertheirminds…