Coco Carlomagno is the well - respected, if somewhat easily startled, Chief of Police in Buenos Aires. Alberta is his more sensible cousin. Together they crack the cases that confound this puzzling city. Coco's nerves are all a - jangle. Deep in a cemetery in Buenos Aires, the tomb of the famous, much - lamented tango singer Anibal Manzana has everyone baffled. It is talking! Could it be haunted? Luckily Coco has his commonsensical cousin Alberta on hand to help. Can they unravel this ghostly riddle?