一次偶然的机会，读初一的小男生纳认识了在普吉开店的女网友珍，两个人通过网络熟识，以msn联系了三年，直到纳初三毕业。纳决定来普吉跟珍见面。纳的哥哥梯是医学院大四的学生，由于外形俊朗成绩优秀，所以备受女孩青睐，不少女孩主动投怀送抱，以至于让他对爱情产生了游戏的态度。但是，当他在街上偶遇女孩淳的时候，他才知道原来爱情犹如电击。巧合的是，珍和淳是普吉的一对姐妹花，而且年龄分别与纳和梯相仿。纳来到普吉与珍见面，尾随而至的梯赫然发现淳竟然是珍的姐姐。初三的这对恋人，情窦初开，对爱情充满了甜蜜的憧憬与想象。大四的这对，面临毕业走向社会，他们的抉择似乎拥有一种更理性的光辉。在风光旖旎的普吉岛上，兄弟俩和姐妹俩上演了浪漫的爱情故事……It all started with MSN. Four teenagers making friends online, they yet haven't met, but are bound to come across each other in an unusual circumstance. Thee (Kanin Bhatia) and Nut (Suppasit Chinwinijkul) are siblings who live in Bangkok while June (Sarocha Tanjararak) and Jane are siblings who live in Phuket. Though living in different part of the country, they know how to connect the world in their hand by chatting on MSN making friends with other people. One day, Nut, who is an online friend of Jane knocks on her door to surprise her, but this causes Thee to misunderstand that his brother might be tricked by a stranger who he met online. Then, Thee heads to Phuket to bring Nut back. While seeking Nut in Phuket, Thee meets June, the girl that he chats on MSN, but their encounter isn't much impressive which brings more problems to their complicated love.
