Griefers of the 3 Dimensions

Alex has just gotten back from the P.V.P. tournament, battle scarred and jumpy, but with five awesome new friends. But when she gets home, she finds the two people who saved her on the way home, getting ready to blow up her house! After realizing from her friend that all three dimensions are under attack of griefers, it's up to her and her friends to find out if it's one group of people, or if it's different for all three.