Shen Weiwan was originally an unloved legitimate daughter of the Shen family. She was treated as an abandoned son by her stepmother, and she became the bride of the sick and frail prince Lu Jingyuan in marriage. She thought that marrying into the Eastern Palace was entering a desperate situation, but she didn't expect that the rumored prince who was running out of energy was actually a showman - the coughing of blood was an act, the weakness was just a show, but the calculation and temptation in his eyes were not fake at all.
Assassins attack at night, she fights back swiftly, tearing apart the pretense of a "bastard legitimate daughter"; her concubine poisons her, and the queen makes things difficult for her. She works step by step to unravel the plots of the house-fighting and palace-fighting plots. While Lu Jingyuan was pretending to be sick to watch the show, he couldn't help but make an exception for her: even though he knew the Buddhist temple was in danger, he still threw down his body and ran to protect her; even though he knew his flaws were exposed, he was still willing to take off part of his disguise in front of her.
When the "Prince pretending to be sick" met the "Daughter pretending to be weak", when mutual testing turned into mutual trust, the candlelight in the East Palace reflected the hands of the two intertwined, and also ignited a palace drama of battle of wits and hidden sweetness. They are allies on the same ship, and they are each other's only exception. They are just waiting to clear up the fog of conspiracy and turn this "happy coincidence" into a real good match.