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.

When a team of explorers ventures into the uncharted maze of bones that lies beneath the streets of Paris, they embark on a journey into madness and terror.

A backwoods game warden and a local doctor discover that giant leeches are responsible for disappearances and deaths in a local swamp, but the local police don't believe them.