Wei Lu and the Mysterious Mushrooms

Imagine what you could do if you were INVISIBLE! When a young orphan named Wei Lu discovers some strange mushrooms in the forest, he takes them to his uncle, an apothecary, who explains that tea made from the mushrooms makes the drinker invisible. Soon Wei Lu and his new friend, Princess Mei Ling, embark on a mission to free some children held as slaves in the fireworks factory of the wicked merchant Zu Bing. But once inside the factory, they learn about Zu Bing's traitorous plot to overthrow Mei Ling's father, the king. Will they have time to save the children and the kingdom before it's too late?