The Large Hadron Collider crash has burnt our world drown in a doomsday fire, and a new era has begun. Civilizations have fallen, cities lie in ruins, people transform into animals and animals become humans. "M.U.M.U.: Judgment Day" is a story of a man who tries to escape the mortal trap set by semi-intelligent "mutant dogs", headed by his ex-beloved pet that turned into a cunning monster. Caught unaware in his boat, in the middle of a river by a huge pack of blood-thirsty creatures, he has no weapon to defend himself and almost no chance to survive. The only thing he can do is to smash the heads of these monsters with his oar for as long as possible.