Damon Cross, chairman of Cross Group, is secretly sleeping with Renee — the girlfriend of his adopted son Julian. When Julian brings Renee home to meet the family and announces an upcoming engagement, Damon and Renee must pretend to be strangers in front of his wife Evelyn and their two adopted children. But the household already holds a second secret: Iris, Damon's eighteen-year-old adopted daughter, has been in love with him for years. On the night of her birthday, she seduces him in the living room while Evelyn sleeps just feet away. Damon swears each encounter will be the last, yet he keeps returning to Iris in the dark. Now all four are locked in a web of overlapping betrayals — Renee angling for marriage as a way to stay close to Damon, Iris growing bolder with every secret encounter, and Julian and Evelyn still blind to what is happening beneath the same roof. The Cross family's order is held together by nothing but timing and closed doors.
