Single mum Ellie is shown a missing person post on Facebook. It's of her three-year-old son, Tyler...But he's right there, holding her hand. Surely this is some kind of prank - she knows her friend Louise can go too far with her jokes sometimes. And Ellie is used to the other mums gossiping at the school gates...But now the other parents are questioning whether Tyler is really her child. Ellie does everything she can to prove the post is fake, but the longer it goes on she knows it is malicious. Who would do this to her? And why?It could be her ex, Darren, but deep down she knows it must be linked to what happened all those years ago - the night she's been doing her best to forget...All she knows is that she has to keep her son safe - no matter what.