Summer school's over for Zack and like Cody, he needs a summer job. Arwin steps up and offers to have him works as his assistant, but to his disappointment, Zack's not really the hard-working type. Maddie's off at summer camp when London calls to confess that she still doesn't know how to swim. So when London decides to take swim lessons from the Tipton Life Guard, Lance, she wasn't expecting to fall head over heels for him.