Lisa and Nelson are newly dating and are in that lovey dovey part of their relationship. But Milhouse is jealous. He is secretly in love with Nelson and Milhouse lets Nelson know that. He slips him a love letter but Nelson does not accept his love, and respons violently. Milhouse is crushed by the rejection and Bart devises a plan to help his best friend. At the Simpson house Bart and Milhouse are spying on Lisa while she makes plans with Nelson. They intercept and kidnap her so that she cannot make it to the date. Milhouse disguises himself as Lisa and replaces her in the date. By the dim moonlight, Nelson and "Lisa" make out. Bart and Milhouse then celebrate, their plan was a success.