Ben Bentley and his sister Kate are on holiday in Africa with their parents. When they play some tricks on Samson, a highly respected local African Game Ranger, he reacts angrily and puts an ancient curse on them. When the two children return to their home in England at the end of their holiday, they are not alone. Two evil little creatures from the dark world return with them, to teach them a lesson! Getting rid of the strange uninvited visitors will not be easy and while the tokoloshes are around anything can happen – and it does! Will Ben and Kate manage to rescue their much loved pets from the tokoloshes' gaping, hungry mouths and will the children get through their terrifying night time encounters with the magical creatures from Africa?