"The Aldens are on vacation in Ireland! They're learning all about the legends and staying in a castle that's now a cozy inn! But on their first night there, the children see a mysterious cloaked figure roaming the ground. Could it be one of the banshees that they've read about? Duncarraig Castle has a secret, and it's up to the Boxcar Children to find out what it is!"--Jacket flap.