Daishu hopes to coexist with humans, since worlds of rapters and humans are together facing the energy crisis. Further more, he hopes to learn human emotions. His son Shudo is the mastermind who imports Happiness and attacks Daishu. Shudo also trades with Orchid, the real traitor in the police unit. Orchid doesn't care about either humans or rapters, she only wants to make money and leave the city to survive the energy crisis. With help of Windy, Taki and Ken find out the truth, but Windy falls into hands of Shudo. They rescue Daishu from the unit and join forces to fight Shudo and his two killers. On the other hand, Sergeant Kayama's announcement to suspend Ken is a trap to lure out the real traitor. Orchid is caught by Sergeant Kayama after she sabotaged the police unit's facility. Sergeant Kayama kills Orchid in cold blood, and leads a team to go after Taki. Because of Orchid's sabotage, an artificial magnetic field that protects Hong Kong is turned off, and Shudo is now able to turn the time backward to an age when humans are easy to control. Taki and Ken collaborate with Daishu to stop Shudo.