The Wonder Island boys : capture and pursuit

After a violent shipwreck leaves a seasoned professor and three teenage companions marooned on a remote island, they must turn desperation into invention. Stripped to their clothes, they fashion tools from raw metal and plant fibers, construct a water wheel, a sawmill, and even a loom to clothe themselves. With the help of captured yaks, they build a sturdy wagon that becomes their lifeline for daring forays into the unknown interior.

Their explorations soon reveal a nearby tribe of savages, and the boys learn that some of their fellow castaways have been taken captive. When a frantic warning arrives, the group scrambles to arm themselves, readying guns and a rescue plan that pits ingenuity against danger. The ensuing chase through dense jungle and rugged terrain tests their courage, teamwork, and the fragile hope of saving their friends.