A retired couple, Prudence and Bélisaire Beresford, are pulled back into action when a wealthy Russian heiress goes missing, leading them on a quest to uncover the truth behind a mysterious scientist's secrets to eternal youth.
Associés contre le crime: L'oeuf d'Ambroise
A team of experts is tasked with uncovering the truth behind the sudden disappearance of a wealthy Russian heiress, embarking on a thrilling investigation to unravel the mystery.
