In As Above, So Below, a team of explorers ventures into the catacombs beneath Paris in search of a legendary artifact, only to encounter supernatural horrors that mirror their darkest fears. Combining found-footage immediacy with claustrophobic terror, the film delivers a descent into psychological dread, occult terror, and survival beneath the earth.

Från IMDB:
When a team of explorers venture into the catacombs that lie beneath the streets of Paris, they uncover the dark secret that lies within this city of the dead.