Saviour of the Soul

May-kwan left Ching because she felt guilty over Siu-chuen's death - he was killed while trying to save her from Silver Fox. Though she had loved Ching all along, the grief and trauma from losing Siu-chuen made her need space. Her sister May-wai suggested she use this time to forget Siu-chuen, though May-wai had her own hidden motives for separating them.

Earlier, Siu-chuen had proposed to May-kwan, creating emotional complexity that made his sacrifice harder for her to bear.

Silver Fox lost his right eye during the confrontation at the train station when Siu-chuen was killed. While Fox was attacking May-kwan, she defended herself and severed his eye. This injury occurred as Siu-chuen tried to protect May-kwan from Fox's assault.

Fox had been entrusted by his master Old Eagle to avenge May-kwan's earlier blinding of him, setting the stage for their violent encounter.

The Horrible Angel is a powerful drug that Silver Fox uses to control its victims. When inhaled or introduced into the body, it allows the user to enslave the affected person within 24 hours, effectively turning them into a slave under their control. Fox attempted to use this drug on May-kwan to make her his slave.

Fox had been using various weapons and tactics throughout the film to get closer to May-kwan, with the Horrible Angel being his most dangerous scheme.

After the Madam of Pets refused to save May-kwan from the Horrible Angel poison, Ching desperate to not lose her decided they would die together. He planned to turn on the gas pipes in her flat, triggering a deadly explosion so they could be united in death rather than be separated by the poison or Fox's control.

Earlier, May-kwan had asked Ching to destroy her if she ever became a Horrible Angel, showing both were willing to sacrifice everything for each other.

The Madam of Pets forced Ching to kneel and crawl through a trail of shattered glass as a test of his devotion before she would even consider helping May-kwan. The glass cut his knees severely, but even after he endured this painful trial, she initially refused to help, only agreeing to think about it later.

The Madam of Pets had become jealous and angry when Ching unmasked her and discovered she wasn't May-kwan, motivating her harsh treatment of him.

The Madam of Pets arrived at the explosion scene to rescue May-kwan and administered an antidote, but she pretended to have done this so that May-kwan would abandon Ching and never be with him. Secretly, she gave Ching a separate antidote so he would survive, revealing her true motive was to create separation rather than genuine salvation.

Earlier, Ching had stormed out of her contest after discovering she wasn't May-kwan, which had deeply offended and angered her.

The Madam of Pets had secretly given Ching an extra antidote before the confrontation, knowing the explosion would occur. When the gas exploded, Ching survived by sheltering under a bathtub, and the antidote protected him from the deadly effects. This was part of the Madam of Pets' plan to save him but keep him away from May-kwan.

The Madam of Pets had already been secretly providing Ching with the antidote before the final battle, indicating her hidden agenda.

May-wai was May-kwan's older sister who actively worked to separate Ching from May-kwan throughout the film. She manipulated Ching into believing the Madam of Pets was May-kwan at the contest, shot him with a Suffocate Bullet, and tried to lure him to New York City. Her motivations appeared to be protecting her sister from the dangerous enemies chasing her, though her methods were deceptive and harmful.

May-wai's suggestions to May-kwan about leaving Ching after Siu-chuen's death were her first steps in separating the couple.

Wai-heung was Siu-chuen's younger sister. After Siu-chuen was killed, Ching took responsibility for her and began training her to become his assistant. It was revealed that Wai-heung secretly harbored romantic feelings for Ching, which made it painful for her to learn that May-kwan had always loved Ching and not her brother.

Ching trained Wai-heung on her sixteenth birthday, marking her entry into the mercenaries' world.

Silver Fox sought revenge because May-kwan had blinded his master, Old Eagle, earlier in their past. Old Eagle was a member of the Green Dragon Society, and when May-kwan blinded him, he entrusted his disciple Silver Fox to avenge him. Fox took this oath seriously, promising to pursue vengeance on May-kwan even at the cost of his own life.

The opening of the film establishes this vendetta as the driving force behind Fox's relentless attacks on May-kwan.

May-kwan asked Ching to destroy her because she feared the Horrible Angel drug would turn her into Silver Fox's slave, making her do things against her will. She would rather die than live under Fox's control, so she begged Ching to kill her if the transformation began, showing her trust in him even in her darkest moment.

Fox had already used the drug to threaten her enslavement, making her desperate to prevent that fate.

Yes, Ching and May-kwan end up together. Despite all the obstacles - the poison, the explosions, the Madam of Pets' schemes, and Fox's attacks - both survive. They leave together to roam the world as a couple, their bond strengthened by all the danger, loss, and challenges they faced.

Throughout the film, their love for each other was the driving force that helped them survive each confrontation.