The key to Hell lies deep in your heart.

If ghosts can think and remember who they are, then the physical brain is not the only place where we store our inner selves. Helen is asked to train two young women into the art of communicating with the dead. But Helen's days as a medium are long gone. In fact, she gave up that life 15 years ago when she lost her daughter. Today Helen is a different woman dedicated to her career in brain research. Things start to change when a visit from the other side offers her the design of a device that can do amazing things. But to everything there is a risk.