Her life is spiralling out of control. Helen's decision to quit her addiction comes at a time when she has a chance encounter with an old school teacher. This opens up old wounds that had remained hidden and festering deep within her. She decides it is time for payback for all those that she felt had betrayed her. Helen, bitter and twisted, heads to Edinburgh to begin her killing spree. When the first body is found the police are mystified. When a second body turns up they quickly realise that it is the same killer. They face a race against time to find the connection and the killer.