A filmmaker says the creators of Stranger Things are copycats.

Filmmaker Charlie Kessler is suing show creators Matt and Ross Duffer for allegedly stealing ideas for their hit Netflix show after he pitched a similar project to them.

According to the suit , filed this week in Los Angeles (and posted by Deadline ), Kessler met the brothers at a Tribeca Film Festival party in April 2014. Kessler, whos since worked in technical operations for shows like Jessica Jones and Daredevil, introduced the concept of a feature based on his supernatural short film Montauk that had premiered at the Hamptons International Film Festival two years earlier.

He later handed over the script, ideas, story and the short film to the siblings. Now, Kessler claims they took his ideas without his permission or knowledge. Stranger Things, which originally was titled Montauk when it was sold to Netflix , has become a bona fide smash with a third season in the works.