Zack has finally finished summer school and he works for Arwin, but he finds his new job unsatisfying. Meanwhile, London learns how to swim with help from Lance, after reading a tabloid article that she can't swim. London soon falls in love with Lance. When he takes her to the hotel pool, it gets backed up, causing London and Lance to end up covered in goo, because Zack neglected to replace the filter. Arwin takes the heat for Zack and he is forced to pay for the damages. A guilt-ridden Zack tells Mr. Moseby that he is responsible for not replacing the filter and the damages will be paid by his mother's check. Zack quits working for Arwin and he gets a job at the local mini-mart, where Cody has been working.
—dawsonpersi