Well it started out with all three girls the Sai Samorn gang (Tuk, Noi, Cherry) going on a flight, all those people on the flight was important people of the country, once they were served drinks the ladies organized themselves in their position and killed all on board than parachute out of the plane. Meanwhile the guys (Jackrit & Au) while practicing their secret agent police scene as if it was a real event, they were serious and skilled private officers. They were assigned this job to catch the 'Sai Samorn gang' because it is believed that only Jackrit & Au can hunt them down due to their skills and secret identity. Jackrit & Au owns an old bookstore while the three ladies own a flower shop, they all met by sudden when Tuk needed her favorite book to be repaired, Cherry took it up to the shop and met with Au who fell for her right away. All the leads end up meeting each other at the shop.
Tuk, Noi and Cherry were sisters (by promise) deep inside were just normal people who wanted normal lives but encounter a past that changed their lives forever. They were being transported like animals to be sold away, however an old man came and saved them from death and to repay him they must accept all jobs that was assigned to them, which was to kill important people of Thailand or of the society.
They were to hunt and to eliminate each other, love started deeply for all the leads, sisters loving the same man, when you think one will give you everything, to know you were cheated on by both your love ones, to turn to the evil for comfort and brainwashed to get you hating the sister that you've always loved. The love from two men to one woman, the fighting, the threats and the romance... when one looses it was revenge to the point of murder plots and deadly fights.
Once the love of the three sisters were restored it was also the day when everything was revealed, knowing through all the pains and obstacle to get together and to understand each other again but to discover that their most beloved ones were the person they were supposed to kill what will happen? If they stop escaping, they will either go to jail, kill their love ones or die themselves. When things don't go the way it plans, the only way was to kill or to die.