A poor Chinese family, the Song family that lived in Yaowarat gave up their youngest son Chai to a family friend, who wasn't able to conceive and they wanted a child to run their family business. The Song family later was faced with many problems. Their oldest son Ah-Yong died and the father got hit by a car and passed away. The mother was pregnant at the time. 17 years pass and Chai has grown up to be very irresponsible. His adopted father gets angry at him for messing up a very important meeting and Chai overhears the truth about his adoption, planning to go to Thailand to find his birth parents. Chai meets Mungchu and they argue. Meanwhile, the Song family sells boiled rice porridge, Ming and Fuu always help, while Leng, their youngest brother always fools around. One day, Chai wins the competition for "Mr. Chinatown" and Leng and Fuu plan to rob him. Fuu lures Chai to an empty alley, Leng hits Chai in the head and takes his money. They then take Chai to their home and find out that Chai has lost his memory. Later, Chai works with the Song family and Leng gets jealous that his whole family loves Chai more then him. Time goes by and Chai manages to get pieces of his memory back and has fun taunting Mungchu while working at her family.