The boys locate their parents' favorite band, Love Handel, to perform a reunion concert in the backyard to make up Dad forgetting his wedding anniversary. Meanwhile, Doofenshmirtz plans a surprise birthday party for his daughter, Vanessa.

The boys set out on a high-seas adventure after learning about a mysterious pirate from their grandpa. Meanwhile, Candace spies Perry and Dr. Doofenschmirtz up to their old tricks, but is it all in her head?