The Little Merboy

Phineas is a headstrong merboy whose father just so happens to be King Lawrence, the ruler of the Merpeople. Phineas is fascinated with the world above the sea's surface and is curious about the many artifacts he's collected from shipwrecks. He longs to be a human, and along with his best fish friend, Ferb, and Baljeet the seagull, he occasionally pops up to the surface for a quick look around. Lawrence is furious over this, for he thinks that humans are dangerous to the Merpeople. So he assigns her stepdaughter and court composer, Candace the Crab to watch over her.

Candace is horrified to find that Phineas has fallen in love with a sea loving human princess named Isabella who Phineas saved from a sinking ship. His love for the above-the-water world continually grows while Princess Isabella longs for the mysterious boy with the most beautiful singing voice (and also the cutest face) who saved her. Despondent and knowing that his dad will stop him by any means, Phineas accepts an interesting, but very dangerous invitation from Doofenshmirtz the Sea Warlock (Who is continously called a Witch). Doofenshmirtz transforms Phineas into a human in exchange for his voice, and for his soul should he not be able to get the princess to kiss her within three days. Thus, Phineas, Ferb, Candace and Baljeet must race against time to make that kiss happen, while Doofenshmirtz does what he can to prevent it from happening.