"You Are The Best Thing In My Life" by Ha Tuong Lam centers on the life of Han Van Hy, a young major serving in the military. During a secret mission, she engages in combat with the military battleship of Europe's largest dark organization, Tartarus. An unfortunate accident causes her to fall into the sea, lose her memory, and subsequently become an assassin working for Lu Than Due, the enigmatic leader of Tartarus. After regaining her fragmented memories, Van Hy returns home, hoping to reunite with her family and fiancé, only to find that everyone has turned their backs on her. When Lu Than Due reappears, he draws her into a complex clan war involving the Yu and Du families, forcing her to confront the hidden secrets of her own identity within the Han family. Caught in a whirlwind of emotions, Van Hy is conflicted, torn between love and hatred for Lu Than Due, unsure whether she should embrace him or seek his demise. Follow their tumultuous journey to discover how Van Hy and Lu Than Due will navigate this tangled web of love, hate, and deep-seated grudges, and ultimately, whether she will choose to love him or succumb to her hatred.