On the site of an ancient burial ground sits a looming gray structure whose tenants each are haunted by dark secrets they can never reveal. Overwhelmed by guilt and grief, these people have been drawn by a nameless presence, and now they hide from society in their self-made hells. At the periphery of their awareness, an entity appear -- a guardian of blood and shadows who watches ... and waits. What does this entity know about each tenant, and what are his intentions for these hopeless outcasts?