IM Global, a film financing and distribution company owned by Reliance Entertainment, posted concept art for The Happytime Murders, a movie about a world where puppets and humans co-exist and a puppet detective must solve a murder.

In addition to the concept art, IM Global released a synopsis of the movie: 

In a world where puppets co-exist with humans as second class citizens, puppet private eye and disgraced ex-cop Phil Phillips is hot on the trail of the serial killer who murdered his brother and is now targeting the cast members of the famous 80s television show, “The Happytime Gang.” As the killings continue, Phil’s former flame, Jenny, is next on the list. It’s up to Phil and his ex-partner, Detective Edwards, to find the culprit, but as bad blood and old resentments resurface the clues start pointing to the only viable suspect, Phil himself. Now he’s on the run with only his wits and hardheaded determination, as he tries to solve “The Happytime Murders.”

According to The Hollywood Reporter, the film is set to be directed by Brian Henson, the son of Muppets founder Jim Henson, and produced by Henson studios. Henson directed Muppet Treasure Island and a Muppet Christmas Carol. The script is by Kung Fu Panda screenwriterTodd Berger. Katherine Heigl is attached to star.