New Year and an Elf as a Gift

Someone picks up stray cats on the street, someone takes stray dogs—but I found and adopted an entire elf. And how can you not pick him up on the eve of New Year, when it’s freezing outside, the weather is a nightmare, and he’s alone, hungry, and cold? Now we’ll be dealing with a mountain of problems and mysteries together—the main ones being: who is he really and how did he end up here?