In part 3 of the Regen series things are beginning to take a dark turn. Lucky 13, the genetically modified alligator lizard is still alive and on the loose. The Regen serum continues to convert his consumed calories directly into body mass. Lance Macklin, comes home to hear about his brother’s passing and begins to investigate. Thorne back channels a lucrative deal, while Martin and Kait realize Lucky 13 could still be alive.