"I have nothing in common with my family!" Daniel Kendall is different -- different to the other Kendalls anyway. After all, he's the only one with brown hair and brown eyes, and what's more, he's taller than his family, his friends, and probably everyone else in the entire world. Big sister Jessie has made it clear just how different Daniel is, by explaining that he is in fact, an alien, kindly adopted by her parents. Confused, Daniel turns to his two friends, Freddo and Gordon the Geek, for help to return to his home planet. But when things don't go according to plan Daniel has to decide whether he is an alien or a human after all.