Teamwork (S01E03)

Saito finds himself wrongfully accused of murder and enlists Jiro to seek vengeance on the true culprit. At the same time, Lin discovers that his sister, whom he left back in his hometown, was murdered in Hakata. Driven by fury, he confronts Zhang, the man behind the killing. However, Lin is caught off guard by one of Zhang’s assassins and suffers severe injuries. Detective Banba shows up just in time to assist Lin and vows to help track down the person responsible for his sister's death.