Richard Haig, a distinguished English professor at Trinity College in Cambridge, leads a double life. By day, he’s respected in academia, but by night, he’s entangled with a parade of attractive students. Yearning for deeper connections, his world shifts when his energetic American girlfriend, Kate, reveals her pregnancy. Excited about fatherhood and the chance to build a family, Richard faces a dilemma: his heart belongs to Kate's sister, Olivia, whom he has adored since their first encounter. As he grapples with his feelings, Richard must confront what he truly desires.