Abreann is a young teenager who has been trying to live her life peacefully with her Great Dane puppy, Bosco. However, the trauma they suffered will never be recovered. Abreann and Bosco lost everything and everyone they knew and loved to the Holy Knights themselves. She and Bosco are forced into a life of homelessness and thievery, which is the only way that the two of them will survive on their own. Then, one day, the two of them encounter Meliodas(the Dragon's Sin of Wrath), Ban(the Fox's Sin of Greed), and Elizabeth(the Princess of Liones). Maybe Abreann's life was meant for far more than just an adventure on her own with her puppy.