A dead student found in a bath. A missing killer, hiding more than her location. When the body of a postgraduate student is found in an ice-cold bath, DI Scott Cullen and his team must hunt for the flat’s tenant. But she doesn’t want to be found, hiding more than just her location. Meanwhile, Brian Bain is nearing the endgame in his mission to bring down Cullen, aided and abetted by DS Luke Shepherd, another person who is hiding the truth from Cullen. Will Cullen find the killer? Will Bain succeed in taking revenge? Will Shepherd achieve closure? The Last Drop concludes the Cullen & Bain crime thriller series.