There are five girls named Ploy in the same class at Nusornrangsan School. They are the Active Ploy, Nerdy Ploy, Pretty Ploy, Naughty Ploy and Anon Ploy. Ploypang, an activist, is keen on participating in various club activities in the school and is trusted by teachers, so she is also ostracized by other Ploys. In the end, Ploypang fell in love with a boy named Thap, but the two broke up before graduation because of a misunderstanding.

In order to save the relationship with Mek, Pretty Ploy decided to work as a secretary in Mek's company. However, Mek's mother immediately fired her. Finally, Pretty Ploy decided to work in Paploy's company.

'Ploy' or 'Active Ploy' used to be an active student who was the most outstanding in the school year where there were 5 students named 'Ploy'. She has turned into a distressed girl, got dumped by her boyfriend, and her house is about to be taken away. Active Ploy gets to meet 'Thapchana', her first love which ended not so nicely, and finds out the truth that her sweet puppy love ended just because of the phone number written in the yearbook of the 5 Ploy: Active Ploy, Pretty Ploy, Nerdy Ploy, Naughty Ploy, and Anon Ploy got mixed up!