According to Netflix, the script, written by Joe Russo, is set in an underworld of weapon dealers and traffickers, where a young boy becomes a pawn in a war between notorious drug lords. As kidnappers trap the boy inside one of the world’s most impenetrable cities, his plight attracts a skilled mercenary named Tyler Rake (Hemsworth). Rake is a broken man with nothing to lose, harboring a death wish that makes an already deadly mission even more appealing to him.

Harbour will play a fellow mercenary, albeit one with secret intentions.

The movie is shooting in India and Indonesia, among other locales. The Russos and Mike Larocca are producing via their AGBO Films banner, along with Hemsworth and Eric Gitter.

Harbour became a breakout star playing the grizzled and haunted Sherriff Jim Hopper in Stranger Things, a role that has earned him two Emmy nominations in two seasons as well as a Golden Globe nom. He also received a SAG Award and a Critics' Choice Award.

Harbour is toplining his first feature, Hellboy, the relaunch of the franchise based on the Mike Mignola comic that will be released April 12.

The actor, who just wrapped Stranger Things season 3 and was seen in Suicide Squad and Black Mass, is repped by ICM Partners and Peikof Mahan.