Seth Gamble is bringing his girlfriend, Mackenzie Moss, over his house to meet his parents: David Lord and, stepmother, Bridgette B. The last time Seth saw his stepmother, they made love in the hull of his father's boat, and ever since that day the sexual tension between Seth and his stepmother is still strong and terrifying. Bridgette manages to wedge herself between Seth and Mackenzie, she's determined to be her stepson's one and only, but will Seth allow himself to be taken away from his girlfriend?