The broom star Yu Wanyin, who was born to "knock relatives and friends", was used as a sacrifice by his family to Huo Beixiao, the most feared crazy marshal in the North. Rumor has it that Huo Beixiao practices Western lightning magic, is violent and murderous, and is feared by everyone. However, no one knows that what Yu Wanyin calls "bad luck" is actually the long-lost forbidden magic of the East - the power of shadow.
When she first entered the handsome man's house, she was regarded as a plaything. In a world dominated by Western magic, her power was considered evil and ominous. However, Yu Wanyin relied on this power to save himself from danger many times in assassinations, conspiracies and competitions between various forces, and even turned an army against him. She has grown step by step from an abandoned daughter who was left to be slaughtered to the Queen of the Night that even Huo Beixiao must face up to. From the initial use and curiosity, Huo Beixiao was gradually attracted by her tenacious soul and mysterious power, and finally changed from a "crazy" predator to her most loyal guardian. The two began to test each other's contractual relationship, and finally joined forces, using lightning and shadow to work together to clear out all the dark forces at home and abroad that covet this land, and create a new era in which magic and order coexist.
