During South Song Dynasty when the son of Yu died miserably in the wilderness, the Yu family buried him hastily. Song Ci, who found something unusual, sent people to monitor the house day and night. Unexpectedly, dozens of people in the house became strawmen in the sight of the public. Just when Song Ci was confused, there was another strawman murder in Tonggu County. Facing the cases without clues, the malicious interruption from his colleagues and the pressure of the Royal Court, Song Ci, with his keen insight, finally found the huge conspiracy behind the incidents.

In 13th century China, a martial arts prodigy named Zhang Sanfeng faces personal tragedy and political turmoil. Caught between warring factions, he develops the revolutionary art of Tai Chi amid chaos and conspiracy.