Lan Yu was sent to Prince Li's Mansion to celebrate the illness of his son Yelan because of his family's decline; on the day he entered the house, he saw Ye Lan coughing up blood and lying on the bed, but the maid secretly poured out the soup; Lan Yu heard strange noises in the backyard at night and followed the traces to find Ye Lan Dancing a sword under the moon, her skills are fierce; she pretends not to know, but Ye Lan notices her peeping, and starts to pretend to be sick the next day, coughing heartbreakingly; Lan Yu deliberately cooperates, deliberately knocking over the medicine when serving it, observing Ye Lan Lan Yu's expression; Ye Lan borrowed the hand of a maid to hand over an anonymous letter, warning Lan Yu not to meddle in other people's business; Lan Yu soaked the letter paper in water with her backhand, revealing the map fragments hidden in the paper pattern; she secretly spliced the fragments and found that they pointed to the underground secret room of the palace; Ye Lan sneaked into her room at night, pressed her on the edge of the bed and whispered, 'Do you want to die?'; Lan Yu sneered and asked, 'The prince has been pretending to be sick for many years, are you not afraid of getting really sick?'; When the two confronted The sound of patrolling footsteps was heard outside the window, and Ye Lan immediately retreated into bed and pretended to be fainted; Lan Yu believed that this person had a big secret, and decided to stay in the palace in the name of happiness, waiting for an opportunity to find out the truth; she began to actively participate in the management of the palace, taking the opportunity to contact the accounts and personnel; Ye Lan let her toss on the surface, but secretly sent someone to follow her; Lan Yu found an old blood-stained military robe in the warehouse, embroidered with dark patterns similar to Ye Lan's; Lan's nanny stepped in to stop her, saying that the military robe was a relic of the prince and should not be touched; Lan Yu noticed the nanny's panic and concluded that there must be a hidden secret; she deliberately raised the military robe in front of Ye Lan, and Ye Lan knocked over the teacup with a shake of her hand, murderous intent flashing in her eyes; Lan Yu advanced instead of retreating, saying that she would share the prince's worries, and Ye Lan agreed with a sneer, but showed a playful smile when she turned around; the confrontation between the two gradually came to light from the dark,
