Back with the Hop Wei, Ah Sahm spends his nights at the Barbary Coast fight pit, confronting a new anti-Chinese group: Teddy's Boys. While Ah Toy accuses him of just looking for another fight, an empowered Mai Ling worries about her brother's next steps.

Ah Sahm and Young Jun search for a discreet place to hide their product after striking a deal with a new opium supplier. Mai Ling sends Li Yong and Zing to deliver a message to a rival tong. Penny asks for Ah Sahm's help in protecting her factory.

With their new enterprise going well, Young Jun shares his worries with Ah Sahm about the new men Father Jun has brought over from China. Meanwhile, Chao goes to Mai Ling for help keeping Zing away from his business, and things take a deadly turn at Bill's home.

As the police prepare for retribution, Chao comes to Bill with a mutually beneficial offer. A sympathetic Sophie offers Leary a new plan. Ah Sahm and Penny have a moment when he confides his plans for the future. Buckley urges Blake to take a stand against the Chinese.

A guilty Mai Ling tries to make things right with Ah Sahm. Penny finds her business in trouble and learns that Ah Sahm has been using her. Ah Toy pays an emotional visit to Nellie's Sonoma winery. Bill and Chao put their plot against the Fung Hai into action.

Ah Sahm, Young Jun and Hong travel with Vega to U.S.-Mexico border town Rooker's Mill, owned by Elijah Rooker, for a fight tournament with a hefty cash prize. As he learns more about Vega, Ah Sahm draws the attention of another fighter, Dolph, and later, Rooker himself.

Jun face off. Ah Toy takes matters at a sadistic rival brothel into her own hands. Leary is urged to utilise his political influence. Just as his heroics are praised, Bill is faced with another murder.

The police shut down Chinatown in their hunt for a killer, just as the Hop Wei make a move that puts Mai Ling on edge. Buckley steps into a new role and considers a proposition from Leary, who faces questions from the Irish workingmen. Ah Toy fights for her life.

After Bill and his men are confronted by an angry mob, Chinatown erupts into chaos, forcing the tongs to work together. As Chao and Mai Ling seek shelter, Mai Ling tends to an ailing Ah Toy. Sophie opens her eyes to Leary's world; Lee decides which side he's on.

Young Jun faces a crucial decision after Mai Ling tries to drive a wedge between him and Ah Sahm, who takes the opportunity to go on the offensive against Leary. Resolved to take Buckley down, Penny goes to the press. Mai Ling finally plays her hand against the Hop Wei.