Lost In The Post (Femdom, Chastity)

Louis is desperate to experience long-term chastity, but is unable to find a dominant female to indulge him. He ends up asking an online Dominatrix, who lives hundreds of miles away, to be his keyholder. This works well until he suffers a medical emergency and needs to be released. Although his Mistress agrees to send the key back to him, what exactly can he do when it gets lost in the post?!