When her mother leaves for three months the thirteen year old Lili, along with her dog Hagen, have to go and live with her father Dániel in Budapest. Lili and her dog are inseparable, but by the next morning the Hungarian dog police are already standing at the front door. The next-door-neighbour has registered a complaint and the dog has to go. Dániel drives Hagen to the outskirts of the city and dumps the poor animal there. Lili sets out in search of her dog, who has joined a group of radicalized stray dogs after having experienced the cruelty of humans. Together they are planning a revolt against all cruel dog owners. Their revenge will be merciless and Lili is the only one still able to stop it. At the 2014 Cannes Film Festival this highly original and at times surrealistic film was awarded the main prize, Un Certain Regard. The dogs Luke and Body, who together played the role of Hagen, received the Palm Dog, the award for the best acting achievement by a dog.