In the summer of 1977, three young girls were murdered at an Oklahoma sleepaway camp.

The tragedy led to a 45-year mystery and left Tony- and Emmy-winning actressKristin Chenowethhaunted for decades to come.

An Oklahoma native herself, theSchmigadoonactress was set to join her fellow Girl Scouts at Camp Scott that night.

“I should have been on that trip, but I had gotten sick.

“It has stuck with me my whole life.

I could have been one of them.”

“This is a story I wish I never had to tell,” Chenoweth says.

“It haunts me every day, but this story needs to be told.”

The four-part docuseries premieres May 24 on Hulu.

Watch the exclusive trailer above.