The prison was built sometime before 170 AG by Varrick Global Industries. After Hiroshi Sato was outed as an Equalist and apprehended by his daughter, Asami, he was imprisoned here. As owner of the company that built the prison, Varrick had commissioned it to contain a luxurious jail cell for himself, as he predicted he would end up there one day. As such, after he was arrested for his attempted kidnapping of President Raiko in 171 AG, he ended up there with his assistant, Zhu Li. During the Unalaq crisis, UnaVaatu created spirit vines that laid waste to the city. One of these roots pierced the outside wall of the prison, enabling Varrick and Zhu Li to escape.