HUNG knows that SUNG is innocent and decides to withdraw her legal action. SOR has no interest in working at the engineering firm and resign. Though he promises SUNG to seek for another job, he is fooling around instead. SUNG is furious for SOR’s playful attitude and driven him away. Their friendship is broken up. SOR has no place to go and strays in the street. He settles down under a bridge afterwards. SOR thinks of the past and remembers the friendship with SUNG. When they were still small, SUNG always taught him and helped him to obtain good academic results; moreover, once upon a time, SOR had an accident, when he was waiting for his own father, LIK, who promised to take him out for fun. Luckily, SUNG arrived and saved his life. LIK did not keep his promise and never show up, since then, SOR hated his father very much. SOR understands that SUNG is not really disliked with him but wanted him to rectify his bad habits……