The Tree of Life is starting to die, so the Legends go look for their long lost princess that has been missing for over 16 years. For only the princess can bring the Tree of Life back to it's normal state. Not only is the Tree of Life dying, but the Kingdom has no queen. Next in line for the throne is none other than the long lost princess, so EXO must bring her back quickly and safely. Not only for the Tree of Life, but also for the Kingdom.