In the game, you are contacted by a friend who explains that they were framed for a murder they witnessed in the park. They want you to look around the park to find evidence that can clear their name. Your phone turns into a "UV light" that uncovers evidence hidden to the naked eye like handprints and fibers from a sweater. The game takes place in an actual park, and your friend guides you to multiple landmarks that you can scan to unlock the content and advance the story.