Claire thought her family’s poolside barbecue would be just another summer night. Then her husband, Richard, asks her adult stepson Ethan to massage her injured back. Ethan’s attention soon crosses a line, with Richard only steps away. Claire tries to protect her marriage until she discovers Richard has been having an affair with their neighbor Vanessa—and ordered Ethan to seduce her. Betrayed by the man she trusted most, Claire makes an uneasy alliance with Ethan. But when Vanessa’s violent husband returns, their plan for revenge could turn the backyard into a crime scene.