Crimson Hunt. Behind the Red, #1

Kerry Graham surprises his father by coming out as a gay cross-dresser and non-binary. Then again, when he performs in drag at a local cabaret named The Red, where his cousin works as a tailor. Despite being treated as an outcast, he now feels liberated and accepted in a world where he can truly be himself. He's among people that understand him, and he can finally relax. At least, that's what he believes.
Then, a dress arrives, seemingly an apology for a bit of bigotry from a shop clerk. No one thinks a dress will cause any harm, so he wears it under the stage lights. Things go awry, though, and Kerry wonders what could possibly be happening. A bounty hunter named Martin swoops in, convinced that he can be of aid in the situation. Along with Martin, there's an intrepid FBI agent named Zak on the trail of a pair of sadistic serial killers who target and manipulate young, attractive, feminine men like Kerry. Kerry doesn't believe it at first.
Could these people be targeting him? Then, things happen, and his phone and email fill with messages of horrible images of what these people plan to do to him. He's frightened but staunch about living his life. He is adamant that he won't let them win, no matter what they do to him. Still, as the manipulation and gaslighting continue from afar, he starts to doubt everything he's ever known. He loses his purchase on reality but finds that Martin and Zak ground him.
He refuses to give in to their sadistic games, but in the end, he wonders if his willpower is enough to keep these people away from him.