Ralph is like a celebrity at school for winning the 'Young Inventors' TV competition. Winning the huge £250,000 cheque makes life easier for Ralph, but it does not change him as a person. Ralph's dad Arthur does not have to work such long hours at the battery factory to support his son, and they get to spend more time together. Life is blissful for a while. Then one day, when Ralph and Arthur are watching TV, the programme is interrupted by a shocking live news announcement. The Roborts Ralph designed to help the elderly at the care homes, are now attacking members of the public. Moments later, the phone rings, and one of the producers from the 'Young Inventors' programme wants the £250,000 prize money back, because the Roborts have malfunctioned. Next, a knock at the door leaves Ralph and Arthur exasperated, as the police take the father and son in for questioning. Knowing that they are the chief suspects, and that the TV producer wants the money back, Ralph and Arthur formulate a plan to find the real culprits responsible for sabotaging the Roborts and making them go haywire. Ralph and Arthur hatch a cunning plan to prove their innocence. In a race against time, will they be able to solve the mystery surrounding 'The attack of the Roborts?'