It ends where it all began. Sony Pictures’s Insidious: The Red Door is out in theaters now. The horror franchise’s original cast is back in Insidious: The Red Door, directed by and starring Patrick Wilson. But Wilson covertly pulls triple duty in this sequel; the filmmaker collaborated with the band Ghost, singing on the end title track “Stay.”

The track is a cover of Shakespears Sister’s 1992 hit, which you can check out below.

For the film’s release, Bloody Disgusting spoke with Wilson about his directorial debut, where Wilson recounted the entire story behind “Stay.” The director candidly broke down how he covertly pulled it together and the inspiration behind it.

“It happened behind most people’s backs. I’ll tell you that. Of course, if it’s a big hit, they’ll all take credit for it,” Wilson jokes. “No. I knew I wanted a song, a really cool song. I had this wild hair about Dokken singing ‘Dream Warriors’ in A Nightmare on Elm Street 3. I knew that won’t work because people will ask, ‘What is this? This has nothing to do with the movie.’ Lyrically, it’s pretty sound, but I didn’t want it to seem like a joke, even though I love that tune. But I long for that kind of song at the end of a movie. I’m a big Ghost fan. Blumhouse had worked with Ghost on ‘Hunter’s Moon’ for Halloween Kills. Right?

“That was always in the back of my mind, but I didn’t know if I wanted to ask them again. I wanted to do something different. I knew it needed to be different. But I knew I would not have a lot of time or money, to be quite honest with you. I became friends with Tim Bickford, who’s at their label, and he and I just on our own would sit and throw around ideas and certain songs like, ‘Hey, you know Tobias [Forge] has got five new tracks, that he is going to start releasing these covers.’ And they were awesome. ‘We Don’t Need Another Hero.’ That’s cool, but I can’t say ‘Thunderdome’ in my ‘Insidious’ movie.”

Then I said, ‘Look, I don’t know if we can do this, but thank you for trying. These are the themes of the movie.’ I went through everything because they hadn’t seen the movie. I said, ‘This is stuff I want to deal with if I could find a song.’ Then, literally within two weeks, he was like, ‘This may be the track. It’s already done, so you don’t even have to pay for it to be done.’ Because I said, ‘And my dream is to sing on the track,’ because I think it would be one, probably not since John Carpenter and singing Big Trouble Little China. I don’t know if a director has sung on their own track on their own album or their own movie. So, he sent me the track, and the lyrics blew me away. Then he said, ‘Tobias would really be down for you doing the first two verses, and then he comes in like, basically, the devil’s presence.’ I thought, ‘This is incredible.’ It’s like Josh Lambert singing it in a weird way. Oh, this is going to be great.

“Then they just set it up, and literally, there was an email chain that was, ‘What is the end credit’s song?’ Then a bunch of people write back, ‘Oh, there’s nothing. We’ll find it.’ I replied, ‘No, no. I’m recording a song with Ghost,’ and I get this influx and people from Blumhouse. They’re like, ‘What?’ I was like, ‘I’m done asking for stuff. We’re just going to do it.’ So, we just went and did it. Luckily, Dan Malsch is the engineer on maybe a couple of their albums. He worked with Avenged Sevenfold, a bunch of bands that I love. He’s like an hour away from me. I went to the Poconos, talked to Tobias on the way, and was like, ‘This is what I’m thinking of doing. I’d like to wail at the end a little bit and do something different.’ He said, ‘Go for it.’ And they loved it. Here we are.”

Here we are, indeed. Listen to Wilson sing with Ghost below.