The puppy in Slime Rain is lost. The hostess brought him a walk in the park, but the pet fell off the leash and rushed off to chase butterflies. From so carried away that he ran far away and lost the mistress. When the sky came to his senses began to overtake into clouds and they look somehow strange. Soon, something began to pour in heaven and this is not rain, but large slugs of large sizes. Moreover, they are not safe, these are real monsters. If one of them falls on the head of the poor puppy, he will not be greeted. Together with the monsters, coins fall, they need to be caught, and from slugs to dodge Slime Rain.