One crew - one killer. Andrea (Catherine Walker), a damage regulator from Benthos Oil, is sent out to Rig 45 two days before Christmas to investigate a fatal accident. As she arrives Andrea finds that the small crew is unwilling to talk to her and she has a hard time finding out the truth. Just when the rig is hit by a hurricane and all forms of communications to the mainland is cut off, a second accident happens. Andrea realises that she and the rest of the crew are in real danger. One of them is a killer, but the question is who.