What makes A Bittersweet Life linger, 20 years later, is its title. The "sweet" is the memory of Hee-soo’s face, the taste of that glass of wine, the fleeting warmth of a sunrise after a long night. The "bitter" is everything else: the knowledge that kindness is a liability, that loyalty is a currency, and that in the world of men, a soft heart is a death sentence. Sun-woo dies not because he was weak, but because he was, for one perfect, disastrous moment, alive.
On its surface, the plot is classical tragedy. Sun-woo (Lee Byung-hun in a career-defining performance) is the perfect manager of a luxury hotel owned by crime boss Kang. He is efficient, cold, and silent. When Kang suspects his young mistress, Hee-soo (Shin Min-a), is cheating, he orders Sun-woo to handle it—and if necessary, to kill her. But Sun-woo watches Hee-soo from afar. He sees her smile, her nervous energy, her life. When he confronts her and her lover, he does not raise his gun. He walks away. A Bittersweet Life 2005
But revenge is too simple a word. Sun-woo does not seek justice, or even vengeance for the betrayal. He is chasing an emotion he cannot name. Why did he spare Hee-soo? Was it love? Pity? A sudden disgust with his own mechanical existence? The film refuses to answer, because Sun-woo himself does not know. All he knows is that for one moment, he chose to be human, and the consequence is that he must now kill every man who reminds him of the monster he used to be. What makes A Bittersweet Life linger, 20 years