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.

Russ is forced to turn to the last person he wants help from to assist on a murder investigation: his mother, a convicted counterfeiter and con artist.

Milt is caught in the middle of Commander Guziewicz’s personal life when her adopted son asks him to investigate if the man jailed for his birth parents’ murders is actually innocent,

Russ helps Font investigate when he is certain one of the FBI’s most wanted fugitives is hiding in Battle Creek, even though Milt insists that the man died months earlier.

Milt and the Battle Creek P.D. work overtime to locate and rescue Russ after he’s taken hostage by an escaped convict.

Milt puts his career on the line when he illegally uses NSA feeds to help a woman determine who shot her husband. Also, a local doctor is drawn to Russ' show of compassion, and Holly is frustrated that her new relationship isn't progressing.

Milt learns more about Russ' youth when the local high school football coach is murdered. Also, Russ and Holly's friendship reaches a crossroad.

Milt survives a car bombing and enlists Russ to track down his would-be assassin, leading to startling revelations about why Milt is the way he is and what brought him to Battle Creek.