剧情：
2010年上映，Andrew,Paquin执导，由Anna,Paquin,Stephen,Moyer,Tricia,Helfer,Jessica,Collins等主演的开放日在美国发行，
豆瓣评分和口碑都很不错，开放日手机在线观看等资源均是网络收集而来。
Acoupleonthevergeofanastydivorceattempttoselltheiremptylovenestandmoveonwiththeirlives,separately.Afterasuccessfulopenhousetheyarehorrifiedtodiscover,dayslater,thatapotentialbuyerdidn’tleavetheirhome.WhileAliceisbeingheldcaptiveinthebasement,theunannouncedhouseguestmovesinupstairs.Shesenseshercaptureisbeingkeptarebellioussecret.Sheknowsherwayonlywayoutifshecanonlygetoutalive.
