Boris Grigov is an elderly Russian refugee who has fled to Nice. Nobody knows where his wealth and the exceptional vitality he shows come from. Grigov is obsessed with the death of the Tsar’s family, which he witnessed as a boy. Thanks to a clairvoyant, he manages to evoke the spirit of one of the Romanovs’ daughters. Together with her, however, the shadow of Rasputin appears as well, and begins to pursue the old man. But Mystère, who is in Nice together with Grigov’s grandson, suspects that underneath it all there is some kind of scam.