Eva and Kat love a carefree existence in their house boat on a London canal. Until Eva's fantasy to become a mommy is reignited by his or her pet's passing. Kat wants to get a cat. However, if Kat's best friend, Roger, visits from Barcelona, they pick in an instant of drunkenness he is able to be Eva's sperm donor. However, which will be the consequences for both the child, the father, the couple along with their connections together?