What to say about this game without spoiling everything about what makes it great?
It's about being a ghost and doing tricks! Obviously it's about death. About relationships and how each action can affect the other, good or bad. It's about second chances and trying again, no matter how many times it takes.
It's a great game, though it does deal a lot with the death of pets if that bothers anyone. I highly recommend playing it if you're able to.
Anyways, play Ghost Trick.