Twelve-year-old twins Josh and Jessica are just about getting used to the idea that their gran is an ultra-secret - and ultra-deadly - ninja spy, and they're thrilled that their stay in Tokyo has been extended.

Apart from getting to learn some kick-ass fighting moves from Granny, it means they get to attend a football game and meet the best goalie in the world, Shini Hanzo.

But although Shini seems pleased to meet them, the twins can't help noticing he's acting a little suspiciously - and that trouble follows him everywhere.

First there are the thugs who smash up his parents' restaurant, then there's the strange accidentA" at the team photoshoot, and then the poisoning at a glam party he attends.

Something is going on - and if Granny and the twins can't work out who's playing dirty, the upcoming big international match could be a major disaster.

The second in the action-packed martial arts adventure series filled with crime-fighting action!