When Henry, Jessie, Violet, and Benny boarded a train to help the Reddimus’s Society return a stolen treasure, they didn’t plan on traveling around the world. But after a close call with the society’s archrivals — the Argents — it’s now up to the Boxcar Children to return the remaining six artifacts to their rightful homes. As the children travel through Egypt, Kenya, England, and Italy, can they stay one step ahead of those trying to sabotage their plans?