Day Cat Night Cat is the engaging "tail" of a young boy called Hayden who lives with a single mother on the edge of the city. He has two fantastical companions. When the sun is up, the day cat visits him and they play wild games together. Then, when he grows tired, the day cat vanishes and the night cat mysteriously appears. First, before Hayden falls asleep, then while he dreams, the night cat provides him with comfort, adventures and protection. Until the sun rises, and the cats magically change shifts again.