The bold detective Jerónimo Ghalia faces the last case of his successful career. He must prove that the happiness machine is a fraud and investigate the alleged financial illicit acts of the international corporation Ultimate Happiness. In addition, there are strange suicide figures, year after year, of those affiliated to this company, which seem to follow a predetermined pattern.

However, the case is not as simple as it seems, ten other researchers have already failed in their attempts to impute Ultimate Happiness, which invests in treasury bills and sovereign funds of several countries and doesn´t deduct their multiple donations for tax purposes. Likewise, the interests of the police chiefs and even those of the President of the Republic converge, aiming to close the investigation without finding guilty ones.

Although the controversial Jerónimo Ghalia, exhausted and suffering from burn-out, after many disappointments during his difficult work, which led him to see the worst of human nature, when analyzing the content of the Ultimate Happiness course and finding the secrets of happiness, gives a new turn to his life, after concluding this latest investigation and going into retirement...