A woman in her thirties whose childhood heart condition is worsening joins a promising stem-cell clinical trial and uncovers a secret program attempting to reverse aging. As she and a persistent medical reporter investigate a wealthy patron's secluded clinic, they discover that experimental regenerative procedures induce catastrophic cellular regression in subjects, producing uncontrollable de-aging with horrific side effects. Captured and subjected to further trials aimed at producing antibodies, the protagonist fights back, exposing the clinic's moral and scientific corruption and emerging from the final confrontation altered in a singular, unprecedented way.