Ben belongs to the blue-blooded clan of the von und zu auf und davon Hohenzwitscherbergs. According to his mother, excellent school grades and a bunch of friends are, of course, a given – but not for Ben! At least he has one single friend: Otto, a terribly cross-eyed opossum. The fact that it can talk is the closely guarded secret of the two. And then a second secret arises: right in front of Ben's bedroom, an unidentified flying object crashes. The mysterious passengers from planet Wups have more than one surprise in store, just like the secret service that is hot on the heels of Ben, Otto, and the extraterrestrial visitors...