The river can take you home. The river can take you under...

In their ramshackle Somerset home, its gardens running down to the river, the Sorrells have gathered for a last-minute wedding.

Lucy is desperate to reunite her fractured family. Eve is fighting to keep her perfect life together. Their father hovers at the edge of events with his second wife. Their mother, Kit, a famous author whose stories have run dry, still seethes with resentment towards her youngest child. And Margot, who left home eight years ago under a black cloud, is forced to come face to face with her darkness...

As the family come together for a week of celebration and confrontation, their relationships are stretched to breaking point. Can you ever heal the wounds of the past? Or will it always rise up to haunt you - like the echoes of a summer's night, like the relentless flow of a river...