Crios is a not-so-ordinary employee in his uncle's ordinary repair shop. When one day a couple of guild members show up, word gets out about his amazing skills. In no time the shut in Crios makes friends and heads out into the world, trying to prove how extraordinary he really is. Although soon he finds out that he is who he is for a reason, and he's part of a much greater plot all revolving around him and his guild, Dragon's Den.