Thedocumentarydepictsmonarchbutterfliesgreatandmysteriousmigration.Eachyearsautumn,millionsofmonarchbutterfliesstarttheirincrediblesouthwardmigrationfromCanada,crossAmerica,toMexico.Theyflyabove2,000milestoarrivethemountainofMexico.....ThefilmopenswithcaterpillarsmunchingmilkweedinsouthernCanadainlatesummer.Sooneachcaterpillartransformsitselfintoasilkychrysalis.Roughly10dayslater,adelicatefour-wingedmonarchemerges.Then,atsomeunknownsignal,themonarchstaketotheaironatwo-month,2,000-mileflightoverfields,forests,cities,plains,openwater,deserts,andfinallymountainstocongregateinatiny,high-altituderegionofcentralMexicowheretheyveneverbeenbefore.Incredibly,theyarrivebythemillionsatthesametimeeachyear.Sheddinglightonthisnaturalwonderaresomeoftheworldsleadingmonarchresearchers,includingLincolnBrowerofSweetBriarCollege,independentbiologistBillCalvert,andOrleyChipTayloroftheUniversityofKansas.Puttingthemonarchphenomenonintoperspective,Taylorsays,YouvegotabutterflythatsoriginatinginToronto,oritsoriginatinginDetroit,Michigan,oritscomingdownfromSt.PaulormaybeevenWinnipeg,anditsmovingsouth.SomehowitfindsitswaytoMexico.Couldyoudothat?Nooneyetknowshowthebutterfliesdoit,butTaylorsresearchrevealsthattheyareexpertnavigators.Inoneexperiment,hetransportedMexico-boundmonarchsfromKansastoWashington,DC,andthensetthemloose.Atfirst,theyflewsouthasiftheywerestillinKansas—acoursethatfromWashingtonwouldmissMexicoentirely.Butafterafewdays,theycorrectedtheirflightpath,asifsomeinbornGPSunithadalertedthemtothetruedirectionoftheirdestination.Inanothersequence,NOVAaccompaniescelebratedmonarchwatcherBillCalvertaroundbackcountryTexasashelooksforsignsofthemonarchmigration.Sureenough,theyshowupenmasseandontime,headingtowardtheSierraMadremountainsacrosstheborder—thelastlegoftheirflight.AndintheMexicanstateofMichoacán,NOVAjoinsmountainvillagersastheycelebratethearrivalofthemonarchsinthefirstweekofNovember.ThebutterfliesarrivalmarksthestartofacelebrationcalledtheDayoftheDead,sincethelocalpeoplehavetraditionallyassociatedthemonarchswiththereturningsoulsoftheirdepartedancestors.Unfortunately,illegalloggingintheMexicanbutterflysanctuariesthreatenstheuniquehabitatthatmonarchsdependonfortheirsurvival.Monarchsmaynotyetbeanendangeredspecies,buttheirannualmigrationisanendangeredphenomenonthatcoulddwindletoinsignificanceifthegiantfirsthattheyclingtoduringthewinterdisappear.Gonealsowouldbethecolorfulfestivalthatclosestheprogram—(🏳)afireworksdisplaywelcomingthehardyflierstoMexico,withorangeburstsagainsttheblacksky,lookingalmostlikethebeautifulcloaksofthemonarchs..两人通过VR进入设备，但却发现(🏠)这次的(⛵)任务是一个陷阱多年来，民防保安队队长一(yī )直被地方(🕎)鼠辈何荣父子事前收买(🍲)为评判(🧟)员，以取巧方式得胜(😅)，使其掌(♈)管(guǎn )国术总(zǒng )会(🌊)，进(jìn )而(🌒)向村民(🛑)收取保护费。于是千星(xī(🕑)ng )就抱着被(🛒)子(🙇)坐在床(chuáng )上(🛢)，看着他(tā )一点点地整理那(nà )一(🥜)(yī )摞资料(🏄)。他(🍹)的想(xiǎ(👌)ng )法(fǎ )与做法遭到了(💙)(le )来(🤓)自方方(🏼)面(miàn )面的(de )阻(⏹)力。在陌生的环境中，芷程(👝)重遇(yù )多年不见的表哥志坚(jiān )（(😸)林德(dé )信饰）(🕢)，虽在表面(💠)上对志坚刁蛮任性(🍊)(xìng )，但内(nèi )心亦不禁视他为唯一的依靠。md，一群(🌊)不靠谱的老家伙(huǒ )，说半天(🚥)啥也没(📿)有提供，苦死我了。年轻的米夏沉溺(🐠)于这(💟)种关系不(🤦)能自(🎎)(zì )拔的同时(⏰)，却发现他自己根本不了解汉娜它(tā(🥕) )茎叶如(🌊)(rú )玉，花瓣晶莹剔透，散发着阵阵清香，正是他要寻找的(🛎)仙(🎍)(xiān )草。