Misty Island is in turmoil: more and more sharks have been sighted recently, and they are even attacking people. Randolph, Marlene, and Jesse try to help, but only Jesse can truly make a difference. He manages to communicate with one of the sharks and discovers that Machine has stationed his submarine nearby. By attracting the sharks, he plans to drive the people out of the area so he can build his oil rigs without any disturbances. However, the unscrupulous villain hasn't accounted for Jesse and Willy.