In 2010, with all their passion for basketball, the students in a prestigious high school in the city are chasing after the dreams and hopes that only basketball can give them. It’s a shiny life of the youth, with sweaty fun games one after another. However, affected by biased values, these high school kids get involved in a money game of campus gambling.With the bad influence extending into the campus, the healthy sport is getting affected negatively. The big money behind the games is a deadly temptation for the kids.The gangsters introduce basketball betting into the campus and develop themselves with the help of ignorant high school students. Just right before the age of 18, they get on the reckless path and waste their youth away.In the face of becoming 18, the age for a reborn, how do they make the critical decision to change their lives?

★ 純樸高中校園竟爆發震驚社會簽賭染黑事件！
★ 創作歌手吳是閎打造主題曲《因為你》，天團F.I.R.獻唱片尾曲《刺青》
★ 傳說每個孩子在成年前必須跨越一道看不見的界線，人們叫它「青春換日線」！

身處2010年都會一所明星高中的同學們，平日瘋狂追逐籃球帶給他們的夢和希望，他們的青春是陽光、是汗水、是一場又一場的嬉鬧遊戲，然而價值觀的偏差，這群高中生竟然玩了他們玩不起的金錢遊戲：校園簽賭。黑暗勢力入侵校園，健康的籃球逐漸染黑，同樣是追逐NBA卻可以賺大錢，對這群孩子產生了致命吸引力，黑幫將職籃簽賭轉移到校園，藉由懵懂無知的高中生發展組織，在18歲來臨前夕他們鋌而走險、揮霍青春，當跨越了18歲的青春換日線，他們該如何扭轉命運，做出關鍵抉擇？