On the distant frontier of the Kingdom of Roco lies a place like a fairyland, yet shrouded in profound mystery—so much so that not a single record of it exists even in the kingdom’s largest library. This place is known as the Valley of Giants. Legend has it that within the Valley of Giants lives a guardian possessing immense eternal energy—a powerful spirit known as "Maqiu." At this very moment, it lies sleeping high atop a towering white tree deep within the valley’s dense, sky-blocking forest, quietly growing. On a dark and stormy night, the Chicken and Ox Troops sent by Enzo, accompanied by the fearsome pet Bard, launch a surprise attack on the Valley of Giants. They snatch the slumbering Maqiu from the white tree. With the guardian taken away, the plants in the Valley of Giants instantly lose their former vitality. At the same time, the once peacefully sleeping tree giants begin to awaken…