Young Detective Dee is the story revolving around Detective Dee when he was young with plunder monster cases before he took office at Ta Li Chi. The Queen Wu Zetian orderes to send some warships to Baekje capital of Korea to support the close ally in the fight against the aggressive Buyeo, because the Tang Dynasty will be the next target of Buyeo if Baekje fail. However, before the warships left port, the command ship is swamped by a very mysterious force from the sea bottom..