The seemingly accidental death of a blind man leads Montalbano to an island off the coast of Siciliy. Here the Inspector discovers that both the murder victim and a local fisherman had each deposited huge sums of money in their respective bank accounts.

Following the mysterious demise of a second man, who was also blind, the investigation begins to focus on the operations of a charitable foundation which increasingly looks not so charitable after all.

Investor Emanuele Gargano has disappeared with the savings entrusted to him by the people of Montelusa. Montalbano's investigation brings him into contact with some of Gargano's staff - his obsessively loyal secretary Mariastella Cosentino and the provocative Michela Manganaro. Meanwhile, Augello is getting cold feet about the prospect of his wedding.

A series of mysterious muggings takes place in Vigata, ending in tragedy when one of the victims is killed. Meanwhile, a man virtually destroys the emergency room at the hospital after finding out that his young daughter is pregnant. A local doctor is also missing and presumed dead. Montalbano investigates all three cases, gradually uncovering the links between them.