Isabella is tired of flirting with Phineas in order for him to love her, so now she's going to try something dangerous and that might not work out. She's going to try to make Phineas jealous. She's not sure if Phineas likes her or if he's even the jealous type, but she's desperate so she'll try anything. But when Doof's invention interferes with her plan things may not go as planed.