When Jonathan goes to Smallville Medical Centre for a physical examination, his doctor diagnoses arterial blockage and recommends a triple bypass heart surgery procedure. Meanwhile, Vince Davis, the older brother of Clark Kent's friend Garrett Davis, needs a liver transplant - but does not receive one and he dies. His body is sent to Metropolis to be the next test subject of Lionel's experiment by Dr. Lia Teng, who injects his dead body with experimental blood platelets and revives him. When Vince gets sick again (because he needs the life-sustaining blood injections on a daily basis), the unstable Garrett loses control and becomes a threat to the patients, employees, and visitors of the hospital by showing up at the hospital with a kryptonite-infused bomb strapped to himself, threatening to blow himself up unless his brother receives a new liver transplant. Clark must try to find a way to defuse the situation during Jonathan's heart surgery, while the overzealous Sheriff Adams wants to kill Garrett in any way possible... even at the expense of the hostages. Meanwhile, Chloe does some investigating for Lex of Dr. Teng and learns about the mysterious blood platelet serum she's manufacturing and about the first test subject: Adam.