The Circus of Adventure

When a mysterious boy named Aloysius arrives for the holidays, Jack and Kiki discover he's a prince in hiding, with enemies determined to seize his throne. The siblings soon find themselves on a daring adventure after Aloysius is kidnapped and taken to the foreign land of Tauri Hessia. With the help of a circus troupe, Jack and his new friends must rally to protect the prince and decide the fate of an entire nation.