Echos(2021)

Original title: Katakomben

The three rich bigwigs Nellie, Max and Janosch visit an illegal luxury underground party under Munich Central Station in search of the next kick. But the party escalates when a fire breaks out. After a mass panic, Max is considered to have disappeared. Nellie and Janosch go in search of their boyfriend and come across a second society, the so-called invisible ones, who live underground.