“Shirley, what’s wrong? Do you feel unwell?”

“Heh, hehe…” Shirley chuckled bitterly. “Retribution.”

She uttered the word with great effort.

Carter frowned.

“What nonsense are you talking about?”

“The fourth stage of the poison is flaring up.” Shirley was breathing heavily; her speech was indistinct.

Carter froze instantly. He took this moment to look closely at Shirley’s face, and he began to panic.

“Where’s the anti-toxoid test reagent? I went to your lab and saw that you’ve finished it.