Libby Parsons, wrongly convicted for her husband Nick's murder, thinks he is still alive and wants to settle the score and find their son. As she has been tried for the crime, she cannot be re-prosecuted if she finds and kills Nick.
A disgruntled former employee hijacks the Seabourn Legend cruise liner. Set on a fixed course, without any means of communication and at the mercy of the hijacker, it's up to the one cop on vacation, and his soon to be fiancé (hopefully) Annie, to regain control of it before it kills the passengers and causes an environmental disaster. Insurmountable and daunting tasks awaits them on their perilous journey throughout the ship trying to fend off the hijacker and save the passengers.