A young prostitute's body is retrieved from Vancouver Harbour, and Sunny notes striking similarities to a string of previous deaths. A chance comment to Da Vinci leads him to re-open several cases, causing a further rift with his ex-wife Patricia, who did the original autopsies, and with his boss James Flynn, who ruled the deaths as accidental.

A police shooting is always a complicated, politically charged matter. Da Vinci convenes a Coroner's Court to investigate, and untangle the web of conflicting evidence, some of it presented by his closest colleagues

When a dead woman is found floating at sea in a small boat, Da Vinci is called in to investigate. Shannon and Leary probe the disappearance of a young pregnant woman.

The team investiages a man found hanging in a vacant house and an elderly man found dead in the woods.

Da Vinci and Zack investigate a death on a golf course. Meanwhile, Shannon and Rose look into a student's drowning.

While Da Vinci remains at odds with the Mayor and Police Chief he attracts attention from Ottawa. Meanwhile, Leary and Kosmo discover that a murdered drug runner was under police surveillance and Shannon's reaction to a personal loss puts his job in jeopardy.

Da Vinci discovers he's the target of a private investigation. Meanwhile, Brian further implicates Sue in the murder of one of his informants.

Da Vinci must get the support of the mayor and police for his red light district proposal. Meanwhile, Sue is secretly interrogated by Internal Affairs and Angela desperately tries to get her.

Da Vinci is up to his eyeballs when the media learns of the mayor's involvement in the hit-and-run, at the same time the wife of a dead longshoreman insists her husband was killed by his co-workers. Meanwhile, Leary uncovers a possible Russian connection in the murder of his childhood friend.

A decision from the Mayor and a fatality at the safe injection site bring Da Vinci's political future into focus. Meanwhile, despite being demoted to robbery, Kosmo is happy to learn the Crown is investigating Brian's policework, and Leary catches a break when a potential witness to Will's murder comes forward.

Da Vinci gathers his political allies hoping to emerge as a front-runner for mayor. Meanwhile, Leary races to arrest Will's murderer before the DEA can slip him across the border, and a body in a burned-out car and an arson fire at Kosmo's house may be ominously connected.