When a nun from the Sacred Convent of Queijo Flamengo is found dead at the bottom of a ravine, Inspector Tó Manel—known in criminal circles as the Poirot of Marco de Canaveses—sets out in search of the truth in a mind-boggling investigation.
Set up by their boss to be knocked off following a final heist, soon-to-retire crooks Brian Hope and Charlie McManus get wind of their impending demise and run off with the spoils of their crime. Fleeing their boss, the drug dealers they robbed, the police, and Brian's angry girlfriend, the duo take refuge in a training convent for nuns. In disguise, they convince Sister Superior that they're nuns, a charade they're forced to maintain as their enemies arrive.
Wealthy businessman Zsa-zsa Korda appoints his only daughter, a nun, as sole heir to his estate. As Korda embarks on a new enterprise, they soon become the target of scheming tycoons, foreign terrorists, and determined assassins.
While attending a major horse race with their young son, Nick Jr., Nick and Nora Charles witnesse a shocking murder from the crowded grandstand. What first appears to be an isolated killing soon leads to a maze of corruption, blackmail, gambling scandals, and criminal intrigue. As Nick investigates, he encounters suspicious bookmakers, dishonest officials, rival gangsters, and a mysterious killer determined to stay ahead of the law. Nora, as always, is never far from the action, bringing her quick wit and fearless curiosity to the case.
Harry Crumb is a bumbling and inept private investigator who is hired to solve the kidnapping of a young heiress which he's not expected to solve because his employer is the mastermind behind the kidnapping.