In the 1930s , a Japanese cult called The Temple of Hades was ordered to cooperate with the Japanese military to destroy China. They buy so many young children from poor family , who will be trained as a lethal killing machine and serve the Empire of Japan. One of them is Vajra , who was forced by his captors to fight for the food , and accidentally causing the death of his brother. Several years later , Vajra grown up and become one of the biggest killer in the Hades sect. Vajra escapes to China and joins Shaolin , where he receives spiritual enlightenment and determined to support China against Japan.

In the Ming Dynasty, there lives four orphans, Ying, Sao, Yuanlong and Niehu. Raised in Taoyuan Village, the four are as closed as brothers. Their exceptional martial arts skills allows them to reach the highest rank within the imperial guards. After the four successfully killed the Japanese troop leader, the Emperor orders Ying to escort the Golden Wheel of Time from Sindu (now India) back to the capital, which is said to have the power of time travel and foresee into the future. Now in 2013, Squire Tang, funded by a mysterious financer, digs up three ancient icemen from the outskirt of China; they are Ying, Sao and Niehu. As he is transferring the icemen to Hong Kong for further studies, the vehicle involves in a traffic accident which, unexpectedly, defrosts Ying…