In his past life, the Emperor and Empress's first prince was lost after birth. To spare the Empress from grief, the Emperor adopted an abandoned child for her to raise. Reborn on the eve of appointing the Crown Prince, he swiftly gathers evidence to depose the adopted son and install his biological son, suppressing the faction of the Empress and Empress Dowager in one fell swoop, and reclaiming everything he owed his real son.