Gao Enxing (Han Hyo-joo)'s life was originally smooth sailing. The only entanglement was that she secretly changed her major and chose to study at a culinary school. When she was looking for an opportunity to tell her father the truth, her father called her overseas. He told her brother Gao Enyu that he was suffering from autism and asked her to return quickly. After returning home, Enxing encountered a huge change like a bolt from the blue. Her brother became autistic; her father went bankrupt; her stepmother robbed the inheritance. And her luggage was taken by a passerby in the opposite way. This passerby was the grandson of a large conglomerate, Xian Yuhuan (Lee Seung-gi). He was quite proud on weekdays, which made his grandmother very uncomfortable. One day, Huan's grandmother went out and lost her memory and was helped by Enxing, which made her feel good about Enxing and even took the homeless Enxing to live at home. The most surprising thing for Huan's family was that the grandmother actually gave all her huge inheritance to Enxing! This "brilliant" inheritance made Enxing suffer from the jealousy and suspicion of Huan's family. Huan also changes from his initial hostility to a liking for Eun-seong, and the story unfolds in confusion.