Marty is a devoted mom, who last saw her son, Henry, three years ago when she was unhealthy, coarse, and overweight. When Henry returns home from his latest secret operation, he brings his fiancâee to meet his mom. Marty's still coarse, but has become a babe with a healthy libido. Henry is horrified, but his girlfriend, Emily, is entranced. When Marty begins dating the sultry Tommy, Henry gets the ultimate assignment: spying on his mom and her boyfriend, who is a suspected international art thief.