A man who stops into a foster home to drop off some donations soon tells the kids a story about two teenage friends who uncover a long-lost medallion that transports them back in time.

Two brothers have half of a powerful ancient Chinese talisman. An evil gang leader has the other half, and determines to get the brothers' half and have a complete medallion so he can gain absolute power.

A Hong Kong detective suffers a fatal accident involving a mysterious medallion and is transformed into an immortal warrior with superhuman powers.