A civil servant murders a young man.

February, 1983. Detectives are called to a residential address in the London suburbs following reports that the drains have been clogged by human remains. One of the property’s residents, Dennis Nilsen – a mild-mannered and unassuming civil servant – is brought in for questioning, leading to the discovery of one of the most shocking and disturbing cases of serial murder ever to rock Britain.

Based on a true story. In the 1920's a soldier with shell-shock came back to the Kenmore Mental hospital, where inside he grew the suspicion that the Doctor and Nurses were there not to help, but to kill him.

The meticulous daily routine of a young man is shattered by the shocking discovery of an unexpected presence in his home.