The fifth swashbuckling adventure finds Sir Charlie Stinky Socks embarking on a truly terrifying quest to bring back long lost treasure

Following a musty, dusty map Sir Charlie Stinky Socks, his faithful cat Envelope, and--of course--his good grey mare, enter a scary underground world with all manner of tricks, traps, and medieval puzzles. Sir Charlie must use all his cunning and wit to get the others through. But all of a sudden our trusty hero can't get anything right. Has someone bewitched Sir Charlie? Or stolen his socks? Or maybe this bold brave knight isn't Sir Charlie at all? Yikes! A fraud! An impostor! A fiendish foe who might be after the treasure!