Five years after a Christmas Eve massacre in Harris County, AZ, when a crazed killer returns to an impending condemned water treatment plant to terrorize and kill again. Only this time, the lone survivor from that tragic night is waiting to make this Santa-clad monster pay for what he did.

After being introduced by a mutual college friend, two unnamed characters form an immediate connection. As their romantic relationship progresses, the honeymoon fades and the two are forced to grapple with their own changing identities and career ambitions.

Two private investigators embark on an assignment which leads them into the hands of darkness. Neither investigator is prepared for what lays in wait.