When Rachel and Noah met in college, they thought they might have a future together, but twenty years later, Rachel is married to Jack and Noah is married to Paige. Now with Jack’s bother getting married to Ali, the three couples head out for Portugal for the wedding. Rachel and Paige are both uncomfortable around the volatile Ali, but while Rachel tries to get to know her for her brother’s sake, Paige is completely put off. Over the course of the weekend, jealousy, secrets and guilt threaten to tear apart marriages and friendships, and may even cost someone their life