Gao Feng and the others are unexpectedly stranded on a deserted island. As they struggle to survive, they form deep bonds with a tribe of primitive people, and even become friends with a gorilla, a parrot, and an egret. During an underwater expedition, Gao Feng discovers a mysterious three-colored stone. Its strange reaction leaves everyone baffled. Meanwhile, Wu Huaiyuan sets out on an expedition because of a three-colored stone passed down through his family, encountering many twists and turns on the open sea. Neither side knows the other exists, and each works to unravel the mystery of the stone.
When Wu Huaiyuan approaches the island, a confrontation with the tribe seems imminent, but Gao Feng arrives in time to avert a crisis. The two sides share their experiences and bring out their stones. When the two stones join, they reveal an astonishing secret: the stones are tied to Earth's survival, left behind by a prehistoric civilization to hold back the planet's fracturing. In the end, they hand the stones over to the Security Bureau. Afterward, they often return to the island, continuing this extraordinary friendship that spans civilizations and species.
