Saffy is waiting to go into an important meeting when she receives a missed call and then a text message from her best friend, Leona: Please help - come now. Of course, she races to her friend's house. But when she arrives, she notices something strange. This message was deleted. Leona answers the door, and insists everything's fine. She doesn't know anything about the message. Six hours later, Saffy gets a knock on the door. It's the police. They've found a body. And Saffy was the last one to see them alive.