Chapter 652 Yelena Tries the Drug

• In the end, Elspeth agreed to Yelena's request, but in order to avoid any mishaps, she stayed in the lab for the whole night, trying to minimize the hazard rate of the new drug. However, she couldn't make the drug entirely safe no matter what she did, not even 90%.
• Since this was a matter of Yelena's safety, Elspeth didn't dare to let her guard down.
• Meanwhile, Callum felt his heart ache for her when she saw how swamped she was. "Don't overwork yourself."