The four detectives investigate a ghostly noise in one of their houses. What could it be at all?  Is it of this world or the next? Whatever it is, they won't stop investigating till they solve the case!

Tá torann aisteach aerach le cloisteáil i dteach duine de na bleachtairí. Cad atá ann in aon chor? An den saol seo nó den saol eile é? Pé rud é féin, ní ghlacfaidh na bleachtairí sos ar bith go dtí go réiteoidh siad an cás!