Days before Pound leaves for China for studies, a gang of six, namely New, Matt, Bright, August, Junho, and Pound, gathers for a farewell celebration. They played the King game, which is a game with one simple rule: the holder of the King card can command anyone to do anything he wishes. However, in just one night, the six friends faced life-changing decisions that will change their friendship forever.

The story of two young boys who promised from their hearts to be together forever, but the promise was broken when they had to be apart without a chance to say good bye. But miracle happens, the same heart returned to its owner. This time, will love arise from memory of heart or from this destiny. A story of one heart that bring them all together is about to begin… Love, sacrifice, forgiveness, smiles, and tears that will fulfill every heart.

Five years have passed since Golf "passed away". Bank has never forgotten the love and sacrifice from his step-brother. On the day of his graduation from a university in Chiang Mai, Bank found out that Golf is actually still alive. The two brothers will finally meet again with many unanswered questions during those five years, in a time where society has changed. And their new and old friends are ready to help them grow their love tree again.