天地灵气孕育出一颗能量巨大的混元珠,元始天尊将混元珠提炼成灵珠和魔丸,灵珠投胎为人,助周伐纣时可堪大用;而魔丸则会诞出魔王,为祸人间。元始天尊启动了天劫咒语,3年后天雷将会降临,摧毁魔丸。太乙受命将灵珠托生于陈塘关李靖家的儿子哪吒身上。然而阴差阳错,灵珠和魔丸竟然被掉包。本应是灵珠英雄的哪吒却成了混世大魔王。调皮捣蛋顽劣不堪的哪吒却徒有一颗做英雄的心。然而面对众人对魔丸的误解和即将来临的天雷的降临,哪吒是否命中注定会立地成魔?他将何去何从?The Primus extracts a Mixed Yuan Bead into a spirit bead and a demon bead. The spirit bead can be reincarnated in human to help King Zhou establish a new dynasty, the demon bead will create a devil and harm human. Ne Zha is the one who should be spirit bead hero but he becomes a devil incarnate, because the spirit bead and the demon bead is switched.