The renowned hitman, Flying Dagger, bumps into Wild Dog, who happens to be a hired assassin for mobster Black Leopard. While both of them try to be incognito, they cannot help falling in love with each other. But, Wild Dog has a secret that he can't reveal to Flying Dagger. In the end, Flying Dagger and Wild Dog reveal their secret identities to each other. As the other gangsters brand them as traitors, will they be able to overcome obstacles and keep their love?