Follow the adventures of the seven brothers and sisters who live with their Mum at number 1234567 Chestnut Street. Each of the seven siblings have very different characters. In 'Good Morning', the monsters are sent to the shops for milk and soon learn all about teamwork. In 'Good Night', the monsters won't listen to their Mum and go to sleep. Instead they enjoy a pillow fight and a mosquito hunt, before Mum finally reads them a fairy story. 'The Mystery of the Missing Five' sees Five disappearing after Four tells him he wishes he had never been born. Then the hunt is on to find Five. Finally in 'Seven Little Monsters and a Baby', when Mum takes a nap, Seven is left to look after a neighbour's baby. The monsters realise that baby-sitting is harder than it looks.