'Warrior' is a gritty, action-packed crime drama set during the brutal Tong Wars of San Francisco's Chinatown in the late 19th century. The series follows Ah Sahm , a martial arts prodigy who emigrates from China to San Francisco under mysterious circumstances. After proving his worth as a fighter, Ah Sahm becomes a hatchet man for the Hop Wei, one of Chinatown's most powerful tongs (Chinese organized crime family).
Season two follows rival Chinatown tongs, the Hop Wei and the Long Zii, as they fight for dominance amidst the growing anti-Chinese racism that threatens to destroy them all. After barely surviving last season's disastrous showdown, Ah Sahm is back with the Hop Wei and determined to wreak vengeance on Long Zii's new leader, Mai Ling, who also happens to be his sister. Spending his nights honing his martial arts skills at a notorious Barbary Coast fight pit run by a savvy, opportunistic woman named Rosalita Vega, Ah Sahm harbors ambitions to topple Hop Wei head Father Jun. To accomplish this, he pushes tong heir Young Jun into a new opium deal and welcomes the arrival of an enthusiastic new recruit and fighter, Hong.
As the two tongs fight for dominance over the course of the season, both face numerous outside threats, including from the brutal Fung Hai tong and its nihilistic leader Zing, the embittered Irish labor movement led by tough-as-nails bar owner Dylan Leary, and the hostile local government under the politically spineless Mayor Blake and his scheming deputy, Walter Buckley. With the stakes mounting and tensions with her brother growing, Mai Ling struggles to control her new-partner Zing, and lover and tong lieutenant, Li Yong (Joe Taslim).
Meanwhile, brothel madame Ah Toy continues to pursue her secret and violent agenda and slowly becomes intrigued by Nellie Davenport, a wealthy widow using her fortune to rescue young Chinese sex workers. Struggling to get out from the Fung Hai's grip, debt-ridden police sergeant Bill O'Hara faces growing suspicion from his subordinate while fixer and profiteer Wang Chao continues to play both sides. Socialite-turned-businesswoman Penny Blake works to keep her father's factory open using Chinese labor and must adjust to the arrival of her young, rebellious sister Sophie who begins to cross family lines in favor of the Irish labor movement. Between the local political turmoil and the escalating gang violence, tensions in Chinatown threaten to boil over into a full-scale war that will raise the stakes and its survival of the fittest for those left standing.
