Two brothers, Matt and Sam Burns, discovers the log book of the Viking Club, a junior secret society of boys from a generation or so earlier. While Sam wants to skip the log's details and go straight to look for their old meeting place (the Secret Hide-Out), Matt wants to see if they can first pass the club's membership tests, as they are explained, and be "worthy" of going as prospective members ... if the Hide-Out still exists. Another local boy called Beany joins them in their quest ... and as it turns out, an original Viking Club member who learns of their plan prepares to meet them.