Jimmy Jones sees a meteor falling in a cave. He goes in the cave and an alien plant attacks him. He tells Ben and his team about it, but only Ben 10 Sinhala Cartoon believes him. They go in the cave but, the plant isn't there. Jimmy offers some peanuts to Ben, but he says that he is allergic. The next day, Jimmy sees Ben going into the cave and talking to the plant. He takes a photo of that, but the photo isn't good, so Gwen doesn't believe him. Later, Jimmy goes to the supermarket and Ben, as Humongousaur, attacks him. Jimmy takes his bicycle and runs, but Ben 10 Sinhala Cartoon becomes Cannonbolt and hunts him down. Jimmy goes to Gwen and Kevin and they all go to the cave. In the entrance of the cave they catch Jimmy and they take him to the plant.
Jimmy finds that Gwen, Kevin, and Ben are clones made by the plant. Jimmy remembers Ben's false allergies to peanuts and he throws his peanuts on the cages that the real Ben, Gwen and Kevin are in. Ben 10 Sinhala Cartoon takes the Ultimatrix from his clone then he becomes Ultimate Swampfire and he destroys the Plant. After that, Gwen tells to Jimmy that they will take him more seriously next time.