简介：Abiologylesson’stopicatschoolisgenetics,andOnniSopanenbeginstothinkthatheisactuallylivingwithawrongfamily,andsomewheresomeone-mostlikelyBillGates-ismissinghislonglostson.EverythingseemstosupportOnni’sdoubtofhisorigin-hisbabyphotosarenowheretobefound,andevenhissisterseemstoknowaboutit.WhenOnni’sfriendsaysthatapersonwithblueeyescannotbethechildofbrown-eyedparents,itisalmostcertainthatOnniisachangeling.Whatismore,thereisanewboyintheclass,andOnnidoesnotgetalongwithhim.TheteacherVPdecidestoarrangeaschooltripinordertoimprovetheatmosphereintheclass.DuringtheautumnOnniandMiroforgettheirhostilities,andOnnifindsanaturalexplanationformanythings.Geneticsprovetobeusefulaswell,asthekidswishtohavemoreguineapigs.…