Captain's Treasure

"We are in 1902 in La Rochelle. The famous architect Albert Ballu and his teams are renovating the Saint Nicolas tower, abandoned for several years. As renowned detectives, you are solicited, following a surprising discovery! A mysterious letter from the 17th century has been found. This letter informs us that 3 days before his death, Captain de Besse would have hidden a treasure of inestimable value on the ground floor of the Saint Nicolas tower. Today, despite the discovery of this letter, the State refuses to conduct thorough excavations to retrieve this treasure, fearing to invest time and money in a vast swindle. Therefore, under the pretext of works for the restoration of the tower, you are commissioned to find it at all costs! To avoid arousing suspicion you will need to infiltrate the tower posing as workers. Be careful, you will have 60 minutes before the resumption of the construction site..."