Yan Yun Zhi is investigating a murder and suspects that Sang Yu was also murdered. While at the crime scene he encounters a mysterious person who runs into Sang Qi's residence. Sang Qi sings a song during class and Yan Yun Zhi plays the song on an instrument. Sang Qi questions Yan Yun Zhi about her brother since he composed the song, but he denies knowing her brother. Yan Yun Zhi thinks the killer is hiding in the Imperial College. Song Qi decides to cook for Yan Yun Zhi to win his heart, but another student puts something in the food that makes Sang Qi act weird. Sang Qi is poisoned and falls unconscious. (Source: jindreame at MyDramaList)