Bullies, poisonous reptiles, crazed bugs and military takeovers face two young sisters as they find themselves as stowaways on the skycart, a lift taking cargo into space. With the help of two young brothers, known to the authorities as the Sewer Rats, they travel to different worlds on an adventure that may help save the human race.Riding the skycart into space for free earned the two young brothers the nickname of ‘The Sewer Rats’. When they visit a world so old-fashioned that they still use wheels and wrist-computers they are joined by two young sisters escaping from a game of hide-and-seek gone wrong.They begin an adventure star-hopping between worlds, battling against deadly reptiles and strange telepathic ant-like creatures. They visit a planet where laziness is the norm, but so is dictatorship and police corruption. Aided by their intelligent bio-computer tattoo Newton, the four children battle against a mad general and a champion fighting tattoo intent on revenge.Will they escape the rat-traps? And will they learn the plans the insects have for humanity?