Sean discovers that councilman McKenna’s son is responsible for a series of prank phone calls for non-existant rescue situations. JD and Mr. Tanaka go on a fishing trip to sort out their cultural differences.
Jenna is marching around the Training Center with PHIL PRICE, a photographer getting publicity shots of her in action. Meanwhile, Zack is showing around PEGGY, one of the trainees. They get a frantic call: a scuba tour group has lost some of its members near a reef. Seeing an opportunity for some photos in action, Jenna grabs Phil and directs Sean to bring him with them so he can get the shots. Zack will ride shotgun with Jenna. As they near the area the call came from, Sean notices that the channel marker is missing. He warns Jenna and Zack, but they are too intent on the rescue. The jet ski hits a reef and flips, tossing Jenna and Zack into the water. Zack breaks his ear drum, but suffers through the pain in order to get Jenna, who is trapped under the water. He and Sean res-cue her.
It turns out that there never was a group of scuba divers: it was just another in an in-creasing series of pranks that have been played on the lifeguards. McKenna attempts to use what happened to Zack and Jenna as yet another reason to close down the Training Center. Sean is determined to find out what really happened. Jenna sides with Sean, but McKenna warns her that she attempted a rescue while her certification was expired, so if she does not want to get into trouble, she had better play along with him.
Fortunately, Phil has developed the pictures of Jenna. In the background of one, there is a truck with the channel marker hidden behind some bushes. They cannot quite make out the license plate of the truck, but Sean knows that he is being set up.
Although Zack puts a good face on it, he is devastated by his loss of hearing and the fact that his dreams of being a lifeguard might once again be shattered. Jenna sees his hurt and starts plotting.
Later, another rescue is called in. This time, Sean and company are ready: they ambush the pranksters. One of them turns out to be CRAIG MCKENNA, the councilman’s son. After some pressure is put on him, he confesses: his dad had wanted to make the Training Center look bad so he could have an excuse to shut it down. Jenna immediately jumps into action and suggests that Sean sue. But, Sean is not interested in law suits. He is in-terested in keeping the Training Center open and operational. Realizing that this tactic isn’t going to work, Jenna attempts to co-opt Zack. He agrees to help her with the law suit, but after Sean speaks to him, Zack realizes he can’t live with himself if he makes his money by suing. So, Jenna is foiled again. However, she is named interim city council-person. Sean knows that this means trouble, but he willingly accepts it as part of the cosmic plan. Zack, whose relationship with Peggy is budding, recovers from his hearing loss.
JD has decided to make one final “go” of getting along with Mr. Tanaka by going on a fishing trip with him. Mr. Tanaka is surprisingly willing-because he hopes to use their time alone to convince JD that he is not the right man for Kekoa. Max supplies the boat for the trip. It begins in a highly unpleasant fashion, with Mr. Tanaka and JD barking bitter words at each other. Mr. Tanaka does not want to see Kekoa marry a man who cannot provide her with security. Suddenly, the line goes taut. Mr. Tanaka tries to maintain control of the fish, but winds up being pulled overboard. JD dives in and res-cues him. The two now have some common ground. Mr. Tanaka comes to understand that lifeguarding is important, and gets a new respect for JD-to the point where he even brings him a very nice gift as thanks. But he still does not think Kekoa should marry him.