Stream The Longest Summer Online Free – Watch Full Movie from Home at 123Movies. . It is July 1st of 1997, and Hong Kong is bright in celebration. The United Kingdom handover of Hong Kong to the People's Republic of China leaves Ga Yin, and his fellow soldiers without work. Which leads them to find employment and money any way they can get it. Without much success, Ga Yin decides to join his brother Ga Suen in the triad gang world.