The cruise ship crashed, and former special soldier Lin Xuan and doctor Shen Xia were stranded on an unknown island. Starting with zero supplies, he sharpened coral stones into blades, and she identified plants for medicine, from filtering water with palm leaves to building suspended shelters, piecing together the rules of survival amidst tides and monsoons.
The wreckage of World War II reconnaissance planes and faded plastic bottles left on the island hide clues of the rift in time and space, while the purple sea of fog outside the ring reef always blocks the way back. He used his tactical experience to lay traps, and she used her medical knowledge to deal with infections. The blood blisters on her palms and the scars on her back formed a bond stronger than a rope during their collaboration.
When the bonfire first illuminated the carvings at the entrance of the cave, the two souls forgotten by civilization finally understood: on this isolated island, survival is no longer a struggle of one person - his scar and her scar will eventually become each other's most reliable "navigation star" in the rotation of the sun and the moon.
