One day, the game streamer Bai Xinxin transmigrated into the role of the princess Bai Yueguang in the mystery game "Nightingale and the Rose". But all the characters in this game were out to kill her, and only Lan Sha, the player character, could protect her. Amongst all the jealous yanderes and murderous rivals, Bai Yueguang has to use all her wits to fight off enemies known and unknown, while finding a way to survive with Lan Sha by her side. However, this main character "Lan Sha" also seems a bit...?!