Phillip is a boringly normal man, a computer geek, more functional with logic than with people and their illogical problems. When a sequence of murders takes place in his east London neighborhood he feels linked to them. Unsettling visions possess him, hurling him into a mental breakdown, his decline encouraged by his son, a repellant and menacing presence lurking at the margins of Phillip's life. Simultaneously, the crime detective, the careworn Spencer, yields to a bizarre relationship with his superior officer. Her attitude towards both the case and Spencer verges on the merciless and feeds off the gruesome crimes they are trying to solve. Fathering Sin turns the usual ideas of life and death on their heads.