More than one year after picking up the rights to Boom! Studios' comic book Day Men, Universal Pictures has hired screenwriter Will Simmons to write the adapted screenplay.

Created by Matt Gagnon and Brian Alan Nelson, with illustrations by Brian Stelfreeze, Day Men centers on a group of humans who look after vampires while they sleep during the day, and handle all of their affairs. The vampires in this world are split into mafia-like families, who all vie for control of certain territories. The plot follows one Day Man who becomes a key player when a war breaks out between two families.

Boom! Studios founder/CEO Ross Richie is producing alongside Stephen Christy, the company's president of development. The project will be Universal's second Boom! Studios adaptation, following last year's action-thriller 2 Guns.

Will Simmons wrote Murder City, which landed on The Black List in 2012. That project is currently in development, with Sylvain White attached to direct. He is also writing Defenders for Warner Bros., based on the alien invasion book of the same name by Will McIntosh.