In 1993, sixteen bodies were found entombed within the Malestrazza Building, a mysterious apartment complex built by one of the world's most renowned, yet eccentric, architects. The killer was never caught. Fifteen years later, newly graduated structural engineer Sam Walczak (Mischa Barton of The O.C.) arrives to prepare the site for demolition. But this massive concrete crypt is not entirely empty: Its halls are lined with secrets. Its rooms are filled with fear. And behind its walls, the ultimate horror has lay waiting....until now.