Colin the Crab, the most skilful builder on the eastern riverbank, never hesitated to help his friends. After a week of hard work, the blue garden pavilion of his dreams is still unfinished, and a boisterous fish family has taken over his construction site. Colin, exhausted, buries himself under the blanket and refuses to open his curtains. Colin’s friends are puzzled. An emergency meeting is called for. It’s time for the friends to take action.