Linus is 15 years old, lives in Barcelona, has always felt a bit weird for being the short one in class, but now it’s too much. He has just discovered that he is growing a tail. He tries to hide it by tying a scarf around his waist, but it’s not easy, and when the appendage measures more than 30 centimetres it becomes impossible. His whole world is turned upside down. Neither his family, nor his friends, nor the doctors, let alone the people in the street understand the nightmare he is living. Linus will have to realise that the world is full of geeks just like him, and sometimes it’s not so bad.