This is the origin story of how Onyx came to join the Guardians of the Straits and found her purpose in life. One stormy night, a homeless dog looking for shelter wanders onto a Coast Guard Station in St. Ignace, Michigan. She finds a dry and cozy hiding spot inside a boat’s compartment. When the boat launches and heads into the Straits of Mackinac for a search and rescue mission, the frightened dog is still hidden onboard. But when the tireless Coasties are working to save a man overboard, Onyx the dog surprises everyone with her bravery, and she finds more than a home---she finds a purpose.