Summary Two suspicious fires are investigated. The first is a car fire which killed the car's occupant. And the second is on the exterior of Kosmo's house, the fire which took place while she was at home. Evidence indicates the two were set by the same person. Sue is rushed to hospital on a possible OD. As with all of Curtis' cases, the murder charges against Sue are going to be stayed of which she is unaware, leading to her taking an extraordinary measure while in the hospital. In preparation for the announcement of his candidacy for mayor, Da Vinci brings his team together to discuss his platform, including the controversial issues of expanding the number of safe injection sites and creating a red light district. However some leaked news indicates that there is a mole in Da Vinci's team working in part for his political foe and possible mayoral candidate, the acting mayor Joyce Simkins. Da Vinci uses this mole for his own purposes. He also learns he has an ally in the opposing camp. Leary accuses Simms of knowing and covering up that Tuan was behind Summers' death. Chick and Carter monitor Tuan's movement, thinking he is being aided by Simms to flee to the States while Leary tries to secure an arrest warrant to nab him before he flees. Leary receives pressure from Jacobs and Klotchko to do something he doesn't want to do in this case. What Leary decides to do is based on where he sees his professional future. And the perpetrator of a slew of bank robberies is found dead, the perpetrator well-known to those in the Police Department.

• Crime
• Drama
• Mystery