Ad Infinitum, indeed

Elite Multi-Speciality Hospital, 18:35;

Xi Yuan remained silent for a few minutes, digesting Shou Wu's words completely, the blood inside his veins freezing to coldness, his heart pounding underneath his chest. Poisoned? His Xinghe? For the first time in his life, Xi Yuan felt a weakness in his legs, as he found himself unable to stand or even speak. Swallowing, the man closed his eyes, forcing himself to catch his breath, for he knew that now was not the time to lose himself. 

Finally, he managed to ask, his tone no more confident, "What poison?" There were a lot of questions, actually. Who was the perpetrator? Since when was it all happening? How did the 'poison' reach her exactly? But none of those doubts were as urgent as knowing how fatal the toxic element running through her body was, what was it doing to her exactly, and from where to seek treatment from.