Alex and Christine and Zach and Lydia have been inseparable since their twenties. From student house-shares and grubby pubs to proper homes and grown-up careers, the two couples' lives have been interlinked for decades. Then one evening, Alex and Christine receive a call from a distraught Lydia.
Zach is dead. Inconsolable, Lydia moves in with Alex and Christine. But instead of their loss bringing them closer, the three of them find that love and sorrow give way to anger and bitterness as old entanglements and resentments rise from the past.