Iris Warriors (2017) online

England, 1940: When falling bombs trap eight children in the cellar of their orphanage, their teacher, Miss Shaw (Jessica Brown Findlay) starts to read them a story. As the tale unfolds, they are magically transported to a timeless, mythical island, where they witness the story of Darkness and Light, and of how their union and their conflict produced the Iris Warriors, the seven colors of the rainbow that brighten and illuminate our world