Keith and Lucas' car collides with an oncoming vehicle. Dan races Lucas to the hospital, where he must acknowledge Lucas is his son to save his life.
When a man is found dead in a trash container on Thanksgiving night, Grissom and the team look to what the man ate for the cause of death.
Mac, Stella, and Flack believe that a fantasy game may have led to an assassination; Danny and Hawkes look for a mastermind.
The girls and their mothers spend the day at a spa; Brenda overhears a revelation about Kelly's stepfather.
Taylor ruins Seth's night when she throws a Harbour School event that keeps Summer at a distance, and Marissa's new friendship at the public school worries Summer so she enlists Ryan's help.