Three cases of rape-and-murder have occurred recently. The three victim were strangled to death by the killer and neither finger- prints nor sperms can be found. The police force set up a special team to handle the case. MAN is transferred to YUNG's team to give him a helping hand. YI also returns after his vacation. YUNG finds that the three victims uses the perfume “Envy”. It has special scent and is not popular. Few customers use it. Incidentally YUNG discovers that CHIT's uncle WAI had taken photographs of the three victims in his studio before the tragedies occurred. WAI is suspected. They keep an eye on WAI and finds that he courts DAISY. They go to a hotel and after thirty minutes. the girl screams for help.
