The Spiral.

Jon Caine, a respected lecturer in a university, was found missing. Three months later he resurfaced and massacred a group of civilians and police at a cafe. After being apprehended by Detective Inspector Aleana, he was sent to an asylum to be interrogated by a criminal psychologist, Dr Melanie Surya. Jon was erratic and psychotic, as well as deadly - traits that he didn't have before he went missing. Melanie soon learnt that her very existence is the key to Jon's sudden change of behavior and ultimately, she unlocked the secret that Jon has held inside him.