Kate Warner (Mary Stockley) is a woman in her late twenties. She's running her own startup, is a workaholic and has recently left her boyfriend Mike (Felix Scott) to focus fully on work. Out of nowhere, each of her friends is individually murdered...by what seems to be themselves (a duplicate of themselves that is). Even more frightening, Kate soon finds out that all the victims had a metallic "artifact" implanted in their chest. Knowing that she is the next target along with her ex-boyfriend Mike, the two will have to reunite in an attempt to join forces and stay alive.