The creators of “Once Upon a Time” may be turning to the dark side.

The writing duo, Edward Kitsis and Adam Horowitz, who are also notable for their work in “Lost” have another project in the works.

In a report by The Hollywood Reporter, ABC Family’s description of the series can be quoted as follows:

“Set in the late 1980s, school is out for the summer and a sun-drenched season of firsts beckons the counselors at Camp Clearwater, a seemingly idyllic Midwestern summer camp, including first loves, first kisses and first kills. Clearwater’s dark, ancient mythology awakens, and what was supposed to be a summer of fun soon turns into one of unforgettable scares and evil at every turn. Part coming-of-age story, part supernatural horror story, Dead of Summer is a bold, new series that mixes genres as it examines the light and dark of a summer like no other.”

Entertainment Weekly reports that aside from the Horowitz-Kitsis tandem, OUAT writer Ian Goldberg will also be on board the “Dead of Summer” project as its showrunner.

According to Deadline, ABC Family–which will soon be named Freeform–ordered the upcoming horror show straight-to-series. The report states that the series order is “based on a multiple-script commitment and penalty.”

Deadline says that the project serves as ABC Family’s first venture into the horror genre.

Meanwhile, Bustle reports that it is too early to tell regarding how long the show will stay on air or how many episodes it will have, but given the writers’ experience in other series, “Dead of Summer” is worth a shot.

According to The Hollywood Reporter, “Dead of Summer” joins supernatural-themed “Guilt” and thriller “Beyond” as new orders for the network. THR adds that the show will air some time next year when ABC Family transitions as Freeform and proceed with its re-branding.

For now, Kitsis, Horowitz and Goldberg are busy working on “Once Upon a Time” which is now on its fifth season.