Los Angeles is having a heat wave and it's going to be a busy day for the lifeguards.

An old acquaintance of Eddie's comes to L.A. but it quickly becomes apparent that Eddie does not welcome this visit. Trevor dates a rich woman that is a handful for him to deal with and Mitch worries about upcoming mandatory tests that all lieutenants, including him, must take.

Eddie does not like Shauni's new boyfriend or the way he treats her when things do not go the way he wants. Also Hobie gets in trouble with a girl who likes him.