Before rebirth, Shi Xing and Qi Chenyan were recognized as mortal enemies. After a fire and double betrayal by her sister and fiancé, Shi Xing realized that the person she hated the most was the person who loved her most in the world. When she was dying, Qi Chenyan hugged her tightly and prayed hoarsely that if there was an afterlife, she must love him. Unexpectedly, Shi Xing was reborn. On the day of rebirth, Shi Xing ran towards Qi Chenyan desperately, kissed his lips, and said "I love you".
My suggestion is to start watching from episode 4