Tom Bell, an ageing pharmaceutical billionaire, is facing his twilight years when fate hands him a drug capable of reversing old age. Its chemistry is old, indigenous to an ancient parasite found in South America, and so prone to mutation that its synthesis produces a contagious virus capable of infecting people with extreme longevity. The contagion becomes the start of a terrifying journey into the unknown for the tycoon, who will stop at nothing to cheat death, including sacrificing the lives of those around him. But how far would a government go to hide the knowledge from the public? Ultimately, what happens if Methuselah’s Virus threatens to spread to the entire planet?