All's quiet in the kingdom of Qin until not one, but three armies attack--and, as a steady stream of messengers reveals, that's just the half of it.

Cai Ze gets a royal audience in hopes of using diplomacy to save Qin. Xin tags along with Lord Biao's army. Lord Changping works to find a solution.

Qin sends its troops to defend Hangu Pass, sole gateway to the kingdom. An impressive array of military might is on display as the battle kicks off.

Lord Biao's army finds itself in a bad situation soon after fighting begins. The Wei army brings in equipment that has Zhang Tang rolling his eyes.

As the Wei army tackles the mighty Hangu Pass, the allied army of Meng Wu and Teng are battling the Chu army--and there are old scores to be settled.

Xiang Yi brings out his favorite weapon: a legendary sword. Teng takes on the fierce Chu general Lord Linwu. Xin faces a Zhao army with a grudge.

The horrors of Changping nearly two decades ago have spurred Wan Ji and his army to seek revenge against Qin, with Xianyang slated for annihilation.

A new commander takes over Chu's second army, bringing along a new strategy and a lot of confusion. The grotesque Cheng Hui of Han makes his move.

Rumors about Qin reach Qiang Lei on her journey. Li Mu calculates the best time to strike, and the Battle of Hangu Pass reaches its turning point.

Teng makes a bold decision when his army finds themselves in a bind. Cheng Hui's move pays off. Wei's Wu Fengming has another trick up his sleeve.

As Cheng Hui's poison courses through Zhang Tang's body, the mighty Qin general takes advantage of Huang Yi's cunning strategy and enters the fray.

Qin general Wang Jian seemingly vanishes, army and all, mid-skirmish with Wu Lu Duo and the Yan army. Chu's newest commander goes after Teng's head.

Meng Wu repeats his daring echelon sweep against Chu, but with a twist. Chu's massive Han Ming faces off against Meng Wu in a battle for the ages.

Wa Lin devises a way to hurry along the generals' duel. Li Mu and Lord Chunshen discuss a new strategy, while Wa Lin shows her hand at long last.

The Qin army is riding high when Wa Lin's elites arrive at Hangu Pass. An unpredictable Qin general steps in to assist. Diao is cautiously optimistic.

Qin's Lord Biao confronts Li Mu at the center of his clever whirlpool trap, where he meets a savage warrior with a history of battling great generals.

Xianyang is in disarray as Li Mu's army approaches and King Zheng goes missing. Qin formulates a strategy around a southern outpost--its last hope.

It's up to King Zheng to convince the people of Zui to fight, defending Xianyang and Qin itself. Li Mu's arrival makes them second-guess themselves.

The first day of any battle is a high hurdle to clear, even without civilian troops. Li Mu employs unique tactics overnight to gain the upper hand.

Xin's training with Qiang Lei comes in handy at Zui. Zheng continues to rally the civilian and veteran troops--until something goes terribly wrong.

The castle town of Zui is struggling to stand strong in their drawn-out battle, suffering serious setbacks that put Li Mu on the path to victory.

Reinforcements arrive for Qin, and not a moment too soon. But even the most ferocious mountain warriors are no match for one of Zhao's Three Greats.

An exhausted Xin draws on what remains of his strength to face Pang Nuan. The end of the war with the coalition army is in sight, but at what cost?

The country of Qin celebrates its victory in its capital Kanyou, with a ceremony rewarding the warriors who have distinguished themselves in a notable way against the coalition. On the other hand, Kyou Kai, who left the Hi Shin unit to avenge his sister Kyou Shou, is getting closer and closer to his target, Yuu Ren...

Kyou Kai continues to confront Yuu Ren's subordinates, but preserves herself for the latter. It is time to avenge Kyou Shou, it is time to clear the past. But Yuu Ren is still the one who overcame the ritual. She might be stronger than Kyou Kai imagines.