Synopsis: Three homeless people, Miyuki (the runaway girl), Hana (the ex drag queen) and Gin (the drunk) discover a baby abandoned in the trash on Christmas Eve. They baby becomes a catalyst for a journey that time after time serves up some crazy coincidences.
Tokyo Godfathers is a ridiculously heartwarming and wacky movie, while simultaneously having a lot of serious content - the main characters are homeless, people get beat up, etc..
Satoshi Kon directed/wrote/lots of stuff for this movie, and his ability to combine wackiness and true human feelings in an animated setting really shows. One of the elements of his style that show up a lot are ridiculously detailed and realistic backdrops, with slightly overly-cartoony characters set against them.
I don't want to give away any of the major plot points of the movie, it has a lot of twists and turns, and despite the darker components of the plot, it is lighthearted overall. Many elements of the Christian Christmas story come up, as well as the importance of family, giving the movie a good chance of becoming a Christmas tradition in any house - I highly suggest watching it in December!