U.S. Drug Enforcement Administration agent John (Luke Evans) is not only a super workaholic, but he will also sacrifice everything and do whatever it takes, just to successfully complete the case. Unfortunately, by a twist of fate, he falls in love with Joey (Gui Lunmei), a top "driver" who is quick-thinking and difficult to track down. In the end, he is involved in a criminal conspiracy, forcing the two to separate. Unexpectedly, 15 years later, John came to Taipei to arrest Guan (played by Jiang Chenghao), the leader of the drug cartel. He originally planned to stay for a weekend, but it seemed that fate had intervened again, and he miraculously reunited with Joey, and found that she had already He has a son, Raymond (played by Yang Mingwei). At this time, the threat of Guan followed, and the three of them had to join hands to fight!