" ▁in ▁Summer . ▁During ▁the ▁Change , ▁or ▁transition ▁of ▁power , ▁the ▁former ▁queen ▁is ▁rit ually ▁executed ▁and ▁replaced ▁by ▁her ▁successor ▁in ▁order ▁to ▁avoid ▁open ▁conflict . ▁ ▁The ▁H eg em ony ' s ▁interest ▁in ▁T iam at ▁lies ▁in ▁m ers , ▁a ▁species ▁of ▁sea - d well ing ▁cre atures ▁whose ▁blood ▁contains ▁a ▁virus ▁that ▁hal ts ▁the ▁ag ing ▁process . ▁ ▁M ers ▁are ▁h unted ▁as ▁frequently ▁as ▁possible ▁during ▁the ▁Winter ▁years . ▁The ▁" water ▁of ▁life " ▁produced ▁from ▁their ▁blood ▁allows ▁for ▁virtual ▁imm ort ality . ▁A ▁single ▁Snow ▁Queen ▁reign s ▁for ▁the ▁entire ▁ 1 5 0 - year ▁season . ▁During ▁Winter ▁rule , ▁off world ers ▁bring ▁technology ▁to ▁T iam at ▁in ▁exchange ▁for ▁the ▁water ▁of ▁life . ▁At ▁the ▁end ▁of ▁Winter , ▁they ▁leave ▁T iam at ▁and ▁destroy ▁all ▁high ▁technology , ▁leaving ▁Sum mers ▁to ▁rule ▁under ▁an ▁agr arian ▁l ifest yle . ▁In ▁this ▁way , ▁they ▁explo it ▁T iam at ▁and ▁prevent ▁it ▁from ▁developing ▁the ▁technology ▁to ▁re bel . ▁ ▁Plot ▁summary ▁ ▁A rien rh od , ▁the ▁Snow ▁Queen , ▁has ▁secret ly ▁impl anted ▁several ▁Summer ▁women ▁with ▁cl ones ▁of ▁herself , ▁in ▁the ▁hopes ▁of ▁extending ▁her ▁rule ▁past ▁her ▁rit ual ▁execution ▁at ▁the ▁end ▁of ▁Winter . ▁Moon ▁Daw nt reader ▁Summer ▁is ▁the ▁only ▁one ▁of ▁these ▁cl ones ▁to