Three days after everyone on Earth has shrunk, Mason Reid, a student at Brighton College, navigates the transformed school track field now a giant forest. While rushing to reach a vending machine for food and water during rain, Mason is attacked by a praying mantis. Triggering an automated Infinite Evolution System, he gains the ability 'Full Insight' and is tasked with absorbing the threat's biomass. After absorbing the mantis, Mason evolves, unlocking a new ability called 'Sunder.' As he starts learning to gather materials, an unknown presence approaches, ending the episode on a tense cliffhanger.