This compendium condenses the opening books of the tale set around Lake Geneva and the Great St. Bernard, preserving principal characters, incidents and the moral tensions that drive their fates.

Framing and local colour: The narrator opens from Vevey, where an American family’s brief sojourn prompts reflections on the lake’s scenery and human contradiction. The local boatman Jean Descloux, plain‑spoken and full of regional lore, introduces provincial life and common sense. A heterogeneous cohort embarks on the steamer Winkelried for Vevey — traders, mountebanks (notably the Neapolitan buffoon Pippo), the mendacious pilgrim Conrad, the Augustinian prior with his mastiff Uberto, the Genoese Gaetano Grimaldi and his friend Marcelli, the venerable Bernese Melchior de Willading and his pale daughter Adelheid, the soldier Sigismund, the mute stranger Herr Müller (later called Balthazar), the tempestuous mariner Maso (Il Maledetto) with his Newfoundland dog Nettuno, the avaricious patron Baptiste and the noisy burgher Nicklaus Wagner.

Storm, sacrifice and superstition: A quarrelling passenger cabal, inflamed by prejudice, suspects Balthazar of being Berne’s executioner; tensions mount but the ship sails. Caught in an alpine tempest, the overloaded vessel endures panic: Maso’s seamanship and Sigismund’s heroism rescue several, but others drown or wash ashore. Nettuno plays a lyrical role, bearing tokens to shore; Maso’s grief humanizes him. Balthazar’s revealed identity again provokes fear, while interventions prevent mob violence. At Blonay gratitude leads Melchior to propose Sigismund as Adelheid’s suitor; Sigismund then confesses a concealed parentage intended to spare him hereditary stigma, generating protest from Gaetano Grimaldi and a plea against inherited opprobrium.

Festival, public disgrace and a murder: Vevey’s Abbaye des Vignerons provides a boisterous civic pageant. Amid allegorical processions a brawl between Maso and Conrad is arrested, but the revels continue. The festival’s staged nuptials turn tragic when Jacques Colis publicly retracts his contract upon learning his bride Christine is Balthazar’s daughter; shame and sympathy follow. That night on the St. Bernard route Jacques is found fatally stabbed. A storm forces Adelheid, Christine and their party to shelter; the convent’s brethren tend survivors while suspicion immediately fixes on Balthazar because of his office and recent presence.

Inquiry and tangled identities: At the hospice a formal investigation examines Pippo, Conrad and Maso. Pippo and Conrad give plausible accounts and are provisionally cleared; Maso is detained when jewels matching Colis’s effects are found secreted in Nettuno’s coat. Complicating matters, Maso claims to be Bartolomeo Contini — a prodigal of Genoa’s Doge — while other evidence and Balthazar’s own disclosures point toward Sigismund’s alternative parentage. Documents, relics and physical resemblances produce an equivocal contest over lineage and legal standing.

Denouement and moral resolution: After private negotiations Maso absconds and is later seen to plunge from a precipice and vanish. The Doge ultimately recognizes Sigismund; Sigismund marries Adelheid. Final moral closure occurs when Pippo, condemned on other charges, confesses that he and Conrad — not Maso — killed Jacques and used Nettuno to remove the jewels. The narrative thus probes justice, identity, class prejudice and the uneasy alliance of legal proof with human sympathy.