Welcome to the Worldwide Wanderer Society, the international order of curious travelers. For generations, intrepid wanderers have circled the globe-seeking new experiences, celebrating cultures, and connecting the world, one adventure at a time. Eleven-year-olds Waldo and Wenda are the society's newest wanderers. Their mentor, Wizard Whitebeard, sends thee inquisitive young explorers on international travel missions so they can someday become wizard-level wanderers too. To earn their stripes, Waldo and Wenda must use their skills -- Waldo's creative observation and Wenda's bold athleticism -- to collect magic keys from all corners of the globe. But standing in their way is rival Odlulu, who can't help but cause trouble wherever she goes -- especially when magic keys are involved.