Rain is magical. Looking out his window, a boy witness an invisible girl, her silhouette revealed by the rain as she runs splashing through the night. She's followed by another invisible entity outlined by the rain, a ferocious bipedal monster, which is referred to only as an "unknown."
Fearing for the girl's life, the boy chases after her, following her and the monster through a strange door of light. Emerging on the other side, the boy finds himself in different though familiar world. It looks like his own, a seemingly European city filled with alleyways, though this world is cloaked in perpetual night and never-ending rain. In this world, he too is invisible, his presence revealed only by the rain pattering against his body. The boy sets off in search of the girl, looking for answers. Is he cursed to remain invisible? Can he ever return to his own world?
Those will have to wait though, as the boy is soon running from a pack of different four-legged monsters. He quickly discovers that invisibility has its advantages. By hiding under structures so that the rain doesn't give away his position, the monsters can no longer see him.
Normally, this sort of storybook world would be right up my alley (see: my Unfinished Swan review), but I'm afraid Rain's big trick may be its only trick.