8-yearoldOskarlivesinafamily-runchildren'shome.Everydayheescapestotheworldofhisownimagination.Hisidolistheheroofatvseries,DetectiveBruno.Onthedayofhisbirthday,theboyreceivesatreasure-huntclueleftbehindbyhislateparents.OskardecidestohireDetectiveBruno,hisfavouriteTVseriescharacter,tosolvethequest.Real-lifeBruno,theworn-outactorinPRcrisis,decidestouseOscartorebuildhisimage.TheyembarkonanurbanadventurethroughWarsaw.ThejourneymakesBrunochangehiswaysandhelpsOskarcopewiththelossofhisparents.