Troubledbyboutsofsleepwalkinganddisturbingnightmares,graduatestudentSarahFostergoestoheruniversitysleepresearchcenterforhelp.Butwhenshewakesupafterherfirstnightofbeingmonitored,theworldshelivesinseemstohavechangedinsubtle,Twilight-Zone-esqueways.
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