After a killer drowns somebody in maple syrup, Agnew and Chamberlain have to infiltrate some syrup cartels. Detective White attempts to deal with his medical marijuana dealer.

When BCPD’s police dog, Cookie, sniffs out a stash of heroin in a young girl’s backpack, Russ and Milt have competing theories as to where it came from and why she had it. Also, Jacocks travels to Detroit for a training seminar, with the ulterior motive of finding out why Milt was sent to Battle Creek.

Russ and Milt pit the crime-solving skills of their police dogs against each other as they work to solve the murder of a local waitress. Meanwhile, Russ tries a new tactic to get Milt to admit what brought him to Battle Creek.

After Commander Guziewicz narrowly escapes when her home is burned down, the arson investigation leads Russ and Milt to a variety of suspects, including a string of ex-lovers and her own estranged son. Also, Russ is determined to find out who sent Holly a gift.

When someone attempts to assassinate Battle Creek’s mayor during the annual “Breakfast Day” celebration, Russ and Milt must protect the unorthodox politician while trying to track down the attacker.