Megan, Mark and Andrew return to school in the dead of night but they get no time to relax. A shady military organisation want the power of The 13th Doorway for themselves and take the whole school hostage. Can they keep it's whereabouts a secret? In another world entirely, time has stopped flowing properly. Time has been blocked and is flowing backwards on itself, meaning that the inhabitants of that world are meeting future and past versions of themselves - if time is not unblocked soon, the whole Universe could be in danger. Can Megan enter this world and deal with meeting multiple...