It was a perfect Saturday night. Until she knocked on the door... Rebecca and Sam are happily married and enjoying a typical Saturday night until a knock at the door changes everything. There is a woman outside, and she has something to say. Something that will change the happy couple's relationship forever... With their marriage thrown into turmoil, Rebecca no longer knows who to trust, while Sam is determined to find out who that woman was and why she came to their house. Desperate to save his marriage, Sam is willing to do anything to get the truth, even if it means breaking the law. But as time goes by and things only seem to get worse, it looks like he could lose Rebecca forever. Who is the woman at the door?