This second part continues the story of teenagers placed in cryogenic sleep and revived into a ruined far-future Earth as part of the 7SEEDS survival project, split across teams named for the seasons. It opens with Natsu and Arashi adrift after being separated from Team Summer B, washing up among the others as the groups begin to converge. The survivors press deeper into the transformed world, where overgrown wilds, hostile creatures, and the secrets of the project itself wait to be uncovered.