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.
Maureen, mid-20s, is a personal shopper for a media celebrity. The job pays for her stay in Paris, a city she refuses to leave until she makes contact with her twin brother who previously died there. Her life becomes more complicated when a mysterious person contacts her via text message.
Paolo, an Italian tour bus driver living in Paris, has just summoned up the courage to propose marriage to his German girlfriend Greta. However, a chance encounter with a French woman on a bicycle the very next day turns Paolo's life upside down.
