Weed, GB and Smith meet Hook after they encounter the Golden Retriever puppy, Mel, in a town. Hook explains why Mel ignored them even after Weed saved Mel's life. Hook told them Mel is a member of Blue's pack. He used to be member as well, Blue was kind to Hook and his older brother at first but later became crueler, demanding the puppies to risk their life to steal food. As a puppy, Hook saw Blue kill his brother after rebelling against his cruel ways. Hook was later captured and taken in by a loving master. Smith encourages him that he has a strong spirit to face Blue. Hook breaks free and aids the three Ou dogs from Blue's men.

After the death of Blue, Hook pledges to help Weed when ever can, no matter how far they are in distance. He later on gets attacked in the Northern Alps by one Nero and his men. Nero is a member of Hougen's pack. Gin, John and Akame show up and scare them off. Hook tells Gin he met his son, Weed and that he's in Ou with Smith. He also breaks the news that Sakura had passed away from illness. With the information from Hook, Gin sends Akame to Ou to find Weed and the rest of the soldiers.

Hook sees where Hougen and his men takes the injured John and Gin. He sneaks into the shed where the two Ou leaders are being kept and gives them snow to drink from, he tells them allies are on heir way to help them escape. While Hougen's men are busy killing Rocket's two brothers, the reinforcements show up (Tomi, Lefty and Roshi). When they sneak out with John, he gives Hougen's men the wrong directions to buy them time to escape. He wants to help Gin to escape, but Gin orders him to go aid John.

After burying John's body, Hook escorts Riki through the Northern Alps so they can bury one of John's fangs in Ou.