Eli, at just 11 years of age, suffers from a very rare disease, most of the time being forced to wear an astronaut suit, because his immune system is so weak that ordinary air could kill him. In the last effort to heal his son, Eli’s parents take the boy to a small isolated clinic, led by the mysterious Dr. Horn. Soon, Eli will undergo brutal, painful and bizarre medical procedures, but it won’t take long until, for the boy, the building becomes a haunted prison.