This is the opening track from Delirium. The album is based around the concept of a mental hospital, with each song being a story told from a patient's perspective. Vocalist Cristina Scabbia explained to TeamRock that this track "was inspired by the story of a real sanatorium in the States. It was said to be haunted, so the song is told from the perspective of the spirit that roams the grounds."
Co-vocalist Andrea Ferreo explained why this is the album's opening track. "It was a way to welcome people musically," he said. "It describes this situation where you are locked in your bed and don't quite know what is going on; so it was the perfect song to introduce the place, which is the album. Musically it has lots of double bass drums and female screaming. It's the perfect opener."