Tamio Akanishi works at a public office in Yokohama. He is going through one of the worst periods of his life, having been left by his fiancée. One day, his boss tells him to take care of a big, white dog, abandoned by its previous owner. Tamio begins to live with the dog, who doesn't bark and only makes a sound that sounds like "haw", and thus he names it Haw. While living together, the connection between the two deepens.