S4.E3 ∙ Tread Lightly

Jun Shibata, daughter of an infamous detective, it's on the fast track to leadership within the Metropolitan Police Department. While socially awkward, she is a crime solving genius with superior mental abilities. Assigned to the cold case unit to gain experience, she meets a motley group of investigators who are considered a joke by the senior detectives. Using her deductive abilities, she and her team work on some of the most bizarre unsolved cases ever encountered.

Follows a man who gains the ability to transform into a gaseous state and uses his powers for bank robberies.

Investigation into the murder of two call girls reveals that they were sacrificed. In which Radha and Pankaj, who were living together, have sacrificed themselves at the behest of the Tantrik.

Toko is a detective at the Tokyo Metropolitan Police. Her senior officer is being transferred to another unit. However, before the transfer is completed a rich man is found killed at his house. Aside from the gruesomeness of the murder an oddity is a blue flower on the corpse. A clue is sent to a local publication. The contents seem to be playing with the police. Is it a tease, is it a clue or is it both? The police department is trying to solve the riddle.