Levante,1992,endofsummerinatownonthecoast.Sandra,EvaandMalena,15yearsoldgirls,disappearintoadiscowithoutatrace.Thepolicedonotseemtobelookingintherightdirection,soJavi,Sandra'slittlebrother,beginsaninvestigationwithQuinoandálvaro,hisbestfriends,andZeta,theclassbully.Together,theydiscoverthatthosewhohavetheirsisterarenotofthisworld.