Fog Lake City has a community of stray dogs called the Den. One of them is a four-year-old male named Scar, who was abandoned at a young age and prefers being alone.

Roaming the streets, he discovers a young husky puppy named Comet left in a box in an alleyway. Forming an unexpected bond, Scar and Comet try to survive on the cold winter streets of Fog Lake City.

After a sudden encounter with his former owner, Scar feels trapped in between two worlds. Is he a lonely stray or a lovable pet? He now has to decide where he truly belongs and what it means to be a family.