Gu Wanqing had a splendid life in Medicine King Valley: climbing onto the roofs, catching fish in the river, chasing rare birds and beasts all over the mountains, and causing so many furnace explosions that the old Valley Master would circle the valley three times with a broom in hand. But her father's word was law. One day, she was summoned back to the capital, and before she could enjoy more than a few days of carefree living, an imperial decree left her stunned: she was to marry the seventh prince, Xiao Heng? The living iceberg with a gaze cold enough to kill mosquitoes, nicknamed the Cold-Faced King of Hell?! Later, deep inside that princely residence that looked like a cage, a one-of-a-kind stronghold was quietly built just for her.