Sarah's best friend Victoria surprises her with a genetic testing kit for her birthday, so she may discover more about her family's history. Sarah is thrilled. Victoria, on the other hand, dies tragically that night. A few weeks later, the cops arrive at Sarah's door. They checked the killer's DNA through a genetic testing site's database and found a match: Sarah, the victim of their homicide investigation. It turns out that Sarah's best friend was murdered by a relative... But who's responsible for this?