Ace Boss

The female lead was poisoned with a heart-breaking toxin when she was young. The poison reaches her heart and will cause her to die if not treated, unless she can find a descendant of a renowned family of divine doctors who can save her. The female lead embarks on a journey to find this doctor and also plans to rescue her younger brother, who was taken by the W family.

Along the way, she encounters the male lead, who is being pursued. Initially unwilling to get involved, the female lead soon notices a plum blossom-shaped birthmark on his body. She suspects that he might be the person she's been searching for, and thus decides to save him.