In the 1940s, Hollis Mason was the Hibou, but a final investigation and weight of years ended up pushing him to a deserved retirement. But shortly before this serious decision, Hollis made known to him an ingenious boy named Daniel Dreiberg, who knew how to break through the secret of his double identity. Taking him under his wing, Hollis entrusted him with all the secrets of the anti-crime struggle and trained him to make him not his partner, as he believed, but his successor.