Empress Wu, who rules with her husband Emperor Gaozong, orders the Navys warships to Baekje Kingdom. They are to aid its old ally who is in the midst of an invasion by aggressive Buyeo forces that may target China next. Before they can leave port, however, the commanding warships are sunk by a mysterious black shadow that rises to the surface of the water. This is the action-packed and captivating tale of the legendary Detective Dees beginnings in the Imperial police force. In his very first case, he must investigate reports of a sea monster terrorizing the city, and reveal a sinister conspiracy of treachery and betrayal, leading to the highest reaches of the Imperial family.