Onyx and Hogan are celebrating at the Coast Guard Festival in Grand Haven, Michigan, when they are called back to duty to battle the blaze of a tug and fuel barge that is on fire in Lake Michigan. When the captain arrives on the bridge to brief the crew, she introduces Onyx and Hogan to their newest crewmember, Remi, another Coast Guard morale dog! For this heart-stopping adventure, Hogan will have two trusty four-legged shipmates by his side. And when Onyx's life is threatened during the rescue, Hogan will need all of Remi's strength and skill to help save her.