When teenagers Rachel and Grace travel inside a super-powered rainbow to China, they disturb nature's balance. Using Rachel's connection to the energy of the rainbow and with help from their new friend Xiao Cheng, they must race against time to save the Earth.

Characters from different backgrounds are thrown together when the plane they're travelling on crashes into the Pacific Ocean. A nightmare fight for survival ensues with the air supply running out and dangers creeping in from all sides.