The announcement of the Nguon begins the rituals. The dates set for the celebration are proclaimed in lieu of the acts of the kingdom by the monarch (Mfon), in the presence of members of the secret society. A procession of dignitaries is sent to the marketplace to relay the information to the community.

As soon as the event is announced, the Fonanguon, ritual leaders of the secret society, spread throughout the territory, collect the public's opinions about the governance of the kingdom and the quality of its administration by Mfon. The summary of this collection is an intelligence report called "Nshemme Ngu" (Secret of the Country). At the same time, the ritual officers collect traditional medicines from the custodians of this nature-related knowledge.

The active members of the community, farmers, hunters, fishermen, craftsmen and other traditional trades, bring a selection of their best products as offerings to the monarch. Mfon redistributes these gifts in equal parts and builds up reserve stocks in the palace, in anticipation of shortages. An agropastoral fair is held in the market place. This ritual of offerings is the barometer of the kingdom's economic health.

The apotheosis of the Nguon begins at dusk on a Friday with the entrance of the ritual chiefs from the kingdom's territory into the royal palace in Foumban. This is followed by a vigil reserved for the initiated, during which the traditional agents perform the songs and ritual dance of the Nguon with sacred instruments. They hold a preliminary council with the Mfon on the report of the complaints collected from the population.

On Saturday at dawn, the monarch proceeds on the esplanade of the royal palace to the search of the bags presented by the members of the secret society, containing the traditional medicines collected throughout the kingdom. Mfon collects and capitalizes on these therapeutic and esoteric resources for the purpose of community sharing, ethical control and consolidation of the sacredness of royal power.

The favorable outcome of the public trial of Mfon gives rise to popular celebrations that culminate on Sunday morning with the calling of the big drum (Fit Nkindi), followed by a great carnival march (Sho' Melue) from the royal palace to the trench gate of Foumban, with a triumphal return.

After the collection of traditional medicines, the monarch is subjected to a public trial on his record of governance, in place of the acts of the kingdom. Standing in front of the throne, the justice of the kingdom (Tâ-Ngu) plants two spears, synonymous with the lifting of the royal immunity and the opening of his trial. The ritual agents of the Nguon pronounce the indictments drawn from the complaints collected in the community. If the sentence is unfavorable, the Mfon can be forced to pay fines and even be removed from office. In the event of a positive outcome, a new mandate is granted to the monarch who delivers a speech of re-investiture and receives the renewal of allegiance.

At the end of the procession, the inducting notables (Koms) make a tour of the palace with the Mfon, concluded in secret in the royal vault. There they proceed to a ritual of renewing the legitimacy of the monarch, if the latter is confirmed for a new mandate until the next edition of the Nguon.