After saving Paris from a Snailien invasion, Stitch and his friends are off to the big apple. People have been disappearing all over New York City, and the Galactic Detective Agency suspects that a group of shapeshifting aliens are to blame. Now it is upto Stitch to figure out what has happened to the missing people and save the day. But how do you a solve a mystery when the suspects can disguise themselves to look like anyone, maybe even your best friends?