Buying medicine was only one of the objectives, the other was to have Emelin step aside.
The critical moment was fast approaching; it was time to help expel the toxins from Emelin's father's body.
The process would be exceedingly painful, so having Emelin present might not be best, thus seizing the opportunity to have her distracted.
Once Emelin left, only Ling Zhenfei continued the treatment for the old man.
Actually, if it weren't for Ling Zhenfei, the toxins in the body would be nearly depleted after half a year's consumption.
However, the poisoner was simply a genius; the neurotoxin used was just the right amount.
The dosage was enough to kill a person without leaving much trace of the toxin, so if the person died, even if a forensic scientist dissected the entire body, they wouldn't find the cause of death.
Fortunately, they encountered Ling Zhenfei; otherwise, the person would have died in complete obscurity.
