Episode 5 struck a chord of profound sadness, showcasing a mother's unwavering resolve to safeguard her son. Facing the prospect of Bruce meeting a similar fate, Mama Sun disclosed the identities of the triad members to him. With his exceptional memory, Bruce absorbed every detail in mere hours. Mama Sun cautioned him to utilize this knowledge in case he ever fell into the clutches of the dreaded Red Ribbon Gang, also known as The Boxers.
The curtain lifted on Episode 6 of The Brothers Sun, revealing Mama Sun sending her sons into hiding. Bruce, now privy to the identities of the triad members, was a walking target if the information leaked. The brothers sought refuge in the abode of a wealthy actor, unknowingly sharing space with June, who had recently slain Tony Tang. However, Alexis had her eyes trained on their every movement, thanks to the spyware she had surreptitiously installed on Charles' phone.
Mama Sun ventured to Shanghai, possibly to uncover the mastermind behind the Boxers and the reason they coveted the list. During her stay, she visited her mother, a woman who had never approved of her union with Big Sun. To her dismay, Mama Sun received the devastating news that her sister had passed away, shattering her heart. Big Sun had promised to keep her informed of any adversity affecting her family, yet this news had slipped through the cracks.
As the episode unfolded, the narrative delved into Charles' past and how he earned the moniker of Chairleg Sun. In a restaurant, a gunman had ambushed his family, intent on eliminating his father. Charles, with a chair leg as his weapon, fought back, taking down the assailant and earning himself the infamous nickname. Following this, Charles underwent rigorous training, molding him into the formidable fighter he is today.
Charles received a text message, alerting him to Tk's whereabouts, who was being held captive by the Koreans. He hastened to Tk's rescue, admonishing Bruce to remain within the Mansion's confines. But Bruce, heedless of his brother's counsel, departed with Grace. Here, the series unveiled a stunning revelation: Grace was a member of the Boxers, masquerading as Bruce's friend to infiltrate his family.
Grace stands firm, asserting her innocence and the sincerity of her affections for Bruce. She unveils a bold scheme, one that involves eliminating the heads of the Triad, thereby bringing down the entire organization. Grace envisions her team as a benevolent force, combating the triad to safeguard the innocent. Her motivation is also rooted in vengeance, as her father fell victim to the triad's hired guns. Grace offers a reprieve, promising to spare Mama Sun and Charles if Bruce reveals their names, and Bruce, driven by love for his family, acquiesces.
Charles endeavors to bridge the divide between him and Alexis, but she brushes him off with a shrug. This rejection ignites a rage within him, and he unleashes his fury on the Koreans, decimating them one by one. In that instant, Charles transforms into the predator, and the Koreans become his prey. After venting his anger, Charles emerges victorious, having rescued Tk.
In Shanghai, Mama Sun visits Big Sun in the hospital, intent on killing him for his silence regarding her sister's demise. She vows to destroy the thing he holds dearest in this world - his criminal empire. However, as the episode nears its climax, an unexpected twist occurs. Big Sun awakens from his coma, and the look on his face reveals that he has overheard every word Mama Sun uttered.
