Trevor´s mum has offered him GBP30 to walk the dog every day of the holidays. But Streaker is no ordinary dog, she´s a rocket on four legs with a woof attached. Trevor´s sure there must be a way to control her and Tina, his best friend, knows about training dogs. Their attempts involving such things as a pair of roller skates, a mobile phone and a bicycle, always lead to trouble. Horrid Charlie Smugg bets Trevor he can´t train Streaker before the end of the holidays. But Trevor and Tina constructa dream plan and Charlie has to eat his words.