Pareto's Miscalculation: Caseworker Murder Case

Satomi (Ai Hashimoto), who works as a part-time worker of the Social Welfare Division of Tsugawa City Hall, is suddenly ordered to work as a case worker one day. A trusted senior, Yamakawa (Masato Wada), encouraged me, but with anxiety I started a home visit for my welfare user with my colleague Onodera (Takahisa Masuda). However, later, Yamakawa was found dead at the fire site of an apartment where many users live, raising the suspicion that he was involved in something illegal.