In their mid-30s, Eva (Oona Chaplin
) and Kat (Natalia Tena
) are a happy couple who live on a barge in the canals of London. Their humble, yet carefree, lifestyle is turned upside down when Eva tells Kat she wants a baby. Kat resists, knowing that it will end their bohemian lifestyle.
When Kat's friend Roger (David Verdaguer) drops in from Barcelona to party with the ladies, Eve asks him to donate sperm for a home insemination program. He readily agrees and forced into a corner, Kat sees no other way out but to say yes. When Eve gets pregnant, it all becomes too real for Kat, who never wanted to be a parent.