In their mid-30s, Eva (Oona Chaplin) and Kat's (Natalia Tena) humble, yet carefree, lifestyle in their London canal boat gets turned upside down when Eva presents Kat with an ultimatum: she wants a child. Kat resists, knowing that it will end the bohemian lifestyle she's always envisaged with Eva. When Kat's best friend, Roger (David Verdaguer), drops in from Barcelona to party with the ladies, the three of them toy around with the idea of creating a baby together. Forced into a corner, Kat sees no other way out but to say yes. The group's true feelings are laid bare, leading Eva and Kat to break up while Roger prepares to go back to Barcelona.