Christopher's expression darkened abruptly as he hurried a few steps towards Zoe, who lay on the ground. He knelt down beside her, urgently speaking, "He's fine, just took two sleeping pills, a safe dosage. The blood, it's not his."

Zoe had passed out, unresponsive to his words.

Christopher seemed to only now realize that despite Zoe's past heart failure being a thing of the past, she had undergone a heart transplant. Her transplanted heart, not her own, couldn't withstand much stress.

Despite undergoing the transplant over two years ago, she still needed to take drugs and constantly monitor her emotional and physical well-being.

As a cardiologist himself, Christopher should have...