When a Las Vegas prize fighter is found dead after winning a match, Danny (Josh Duhamel) and Delinda (Molly Sims) decide to stay in Boston to help Jordan (Jill Hennessy) and Woody (Jerry O'Connell) investigate his murder. Meanwhile, Bug (Ravi Kapoor) investigates the death of a young woman whose body was found in the river and had been there since the 1980s. After a month away, Lily (Kathryn Hahn) returns to the morgue.