A rogue submarine captain pulls together a misfit crew to go after a sunken treasure rumored to be lost in the depths of the Black Sea. As greed and desperation take control on-board their claustrophobic vessel, the increasing uncertainty of the mission causes the men to turn on each other to fight for their own survival.

Donna narrowly escapes making a huge mistake by marrying Karl and instead opts for moving in with her friends Karen and Louise in South London. The three girls learn about life and love in this funny and modern comedy.