Tracey receives two tickets for a "Christmas Cruise" in the post - a romantic surprise planned by Darryl before being sent to prison. He booked two tickets as he wanted it to be just Tracey and him, thinking Garth would be on a school trip. Tracey decides to take Garth, annoying Sharon who wanted to go. When Garth telephones to say he will not be home for Christmas, Tracey refuses to go at all. However, Dorien devises a plan to get Tracey and Sharon to go on the cruise.