After transmigrating to the Great Qin of the Warring States period, Ying Rui became the eldest son of the Ying clan, born into humble circumstances. In a chaotic court where the crown prince's seat was vacant, the princes fought for power, and the consort clan held the reins, he saw through the king's tests of character and the truth behind the court's power struggles. When King Zhaoxiang faced the fateful decision to execute Bai Qi, he risked his life to save the Great Qin god of war. By rescuing the general, he won over the army and persuaded the court officials to his side. Maneuvering among the forces of Lü Buwei, Lady Huayang, and the various princes, he broke through one crisis after another while biding his time. He distinguished himself in the trials of the court and was named crown prince of the Great Qin. With the young Ying Zheng at his side, he took charge of Qin's destiny and laid the foundations for an age-old empire that would unite all under heaven!