The story centers on Nick Sax, a vile assassin who nearly dies after a hit goes bad. Inexplicably, the hitman begins to see Happy, a tiny blue horse whose sunny disposition never sours. Nick and his new friend team up to save the life of a troubled kid, just before Christmas, while trying to find redemption for the grouchy contract killer.
Grant Morrison will write the adapted screenplay, with RZA directing and Reginald Hudlin producing. The trio plan to develop the project themselves before seeking a studio or financier.