Sera Sun is murdered on a leap night on 29th Feb, with her limbs dismembered and wrapped up in a Japanese Ukiyo-E stocking. Her mother May Shaw, spirals into despair and guilt. May blindly holds onto the belief that Sera is murdered by a serial killer. She even imitates a real murder in line with the serial killer’s style. Will vengeance bring peace to May? Who is the serial killer?