Tessa Rain is camping with her family at their local state park. Bored from their lack of technology, her and her brother, Andrew, decide to take their dog, Miggs, on a walk in the woods. While on the trails, they get stuck in a torrential downpour and are separated. Alone, Tessa is sucked below the surface of an underwater spring. Slowly, she feels the world slipping away from her... She awakes in a field of orchids, staring up at the full moon. Confused, she gets up and tries to find her way back to the campsite. Little does she know, she's not in that world. She's in a different dimension, known as Crescent. The dimension is under attack, and if it is destroyed, she'll never be able to return to her family. She finds herself in a group of unlikely, time-traveling, dimension-jumping, teenage heroes, trying to save their world just as much as the next. But they have to be careful. All dimensions share the same planet, and whatever happens in one, can affect all the others...