戰國晚期，秦趙爭鋒，戰事迭起。趙國邯鄲，御史李赫的女兒李皓鑭（吳謹言飾）因繼母的陷害，家破人亡·身敗名裂，甚至被賣出。遇不得志的呂不韋（聶遠飾）把她買下，用奇貨可居的計謀將皓鑭獻給了當時在趙國皇宮當人質的秦王孫異人（茅子俊飾）。李·呂二人一同入趙宮，憑智慧擊退了種種陰謀，化解了公主雅（海鈴飾）因愛慕異人而對二人的陷害，受到趙王的青睞。皓鑭下嫁異人，秦國坑殺趙軍四十萬，異人的質子身分讓他生命受到威脅，公主雅陷害皓鑭不成反喪命，讓二人之間產生嫌隙。宮中人人自危，呂不韋利用皓鑭挑起事端騷亂趙國內廷，藉機帶秦王孫異人逃離趙國歸秦。秦國有奸人散播謠言說皓鑭之子嬴政（佟夢實飾）的父親不是異人而是呂不韋。而此時異人病重不治，嬴政登基，認為呂不韋與父親之死難逃關係，同時忌憚呂的權利過大而把流放。皓鑭請求兒子繞呂一命，最後倆人像相識的最初一樣重會洛陽。

During the later stage of the Warring States period, State of Qin and State of Zhao are battling for more grounds and wars often break out between them. In the state os Zhao Handan, Censor-in-chief Li He’s daughter Li Hao Lan (Wu Jinyan) is framed by her stepmother. This not only destroyed her family, but she was disgraced and sold. Down-and-out Lu Buwei (Nie Yuan) happens to buy her. He uses a ridiculously attractive scheme to offer Hao Lan to Ying Yiren (Mao Zijun), King of Qin’s grandson, who is held hostage at a palace in State of Zhao. Li and Lu enter Zhao palace together, and cleverly unravel devious schemes. In particular, the duo manage to dismantle a trap set up by Princess Ya (Karina Hai) for them as she has a crush on Yiren. They even gain King of Zhao’s admiration. Hao Lan becomes Yiren’s wife. As Hao Lan marries a foreign state man, so the State of Qin massacred 400,000 Zhao troops. Yiren’s capacity as a hostage puts him in potential fatal danger. Princess Ya ends up dead as she fails to frame Hao Lan. The bond between the two of them becomes weaker. Everybody senses danger in the palace. Lu Buwei uses Hao Lan to incite disorder in State of Zhao’s inner court. He seizes a chance to make King of Qin’s grandson Yiren escape from State of Zhao and return to State of Qin. Some crook in State of Qin is spreading rumours about father of Hao Lan’s son Ying Zheng (Tong Mengshi) is actually Lu Buwei and not Yiren. Meanwhile, Yiren succumbs to critical illness. Ying Zheng ascends the throne. He reckons Lu Buwei definitely has something to do with his father’s death. He also sends Lu into exile as he does not like him having too much power. Hao Lan begs her son to spare Lu from death. In Luoyang, the two of them finally reunite, just like when they first met.