简介：An18yearoldgirlcalledJoyhasgonemissing.AnothergirlcalledHelenisafewweeksawayfromleavinghercarehome.Helenisaskedto'play'JoyinapolicereconstructionthatwillretraceJoy'slastknownmovements.Joyhadeverything.Alovingfamily,aboyfriend,abrightfuture.Helen,parent-less,haslivedininstitutionsallherlifeandhasneverbeenclosetoanyone.GraduallyHelenbeginstoimmerseherselfintotherole,visitingthepeopleandplacesthatJoyknew;quietlyandcarefullyinsinuatingherwayintothelostgirl'slife.ButisHelentryingtofindoutwhathappenedtoJoythatday,orisshesearchingforherownidentity? 18岁的爱尔兰学生乔伊失踪了。警方为了重现现场，不得不寻找一个相貌类似的女生海伦进行现场重现，而身份、经历完全不同的海伦发现自己要重新融入乔伊的生活，包括她的家人、男友等。…