This beautifully acted ensemble film features four women coming together to celebrate the birthday of a friend who has remained a recluse ever since a car accident with her husband left her in a wheelchair. Over the course of the weekend, much wine is consumed, intimacies are shared, and an unthinkable betrayal forces the group of friends and lovers to re-evaluate long-held beliefs and assumptions. Happy 40th pokes and prods at fragile relationships to reveal uncomfortable truths about the secrets we keep from each other and from ourselves