After the original series was axed after just one season the characters return for this one last case and it looks like it will be a tough one for all concerned. The story opens with a man walking on to a bus and killing the driver before proceeding to shoot each of the passengers. Most of them are just left where they fell but one, a woman, is arranged by the killer so she is hanging out of the window. When Thomas sees the scene he is immediately reminded of a patient he once treated; a former soldier who and just been released from prison after serving six years for killing a teenaged girl. He is the suspect because the crime scene matched one of several macabre pictures he drew while incarcerated. When further murders that match his pictures take place it is clear that he must be the killer… the police just have to catch him before he can kill again.