A life-changing journey begins when twins, Katherine and Thomas Rayner, fall through coloured light pouring from a church window into a different reality - Trinanoch. They have been called by the dwarfish q'Boldi and soon learn that a powerful enemy has set his sights on ruling the everyday world of the twins. Though they must help to thwart the enemy's plans, no one can explain what they must do or how to begin. And, in the end, what if the enemy seems to have the power to save their world? Did they choose the right side?