In the 22nd year of the Republic of China, on Wuyu Island, which was locked in thick fog, Lin Mo, the second young master of the Lin family, died tragically in the wing room with a mandala-patterned dagger stuck in his chest and jasmine petals that should not be there in late autumn scattered around his hands. The eldest brother Lin Chen was attacked at sea and his body was not found, but the ancestral jade pendant mysteriously appeared under the second young master's pillow. Lu Shiyan, a Shanghai detective, landed on the island to investigate the case. Following the untimely scent of jasmine, he uncovered layer by layer the greedy conspiracy of antique trading, the secret collusion between pirates and foreigners, and the dusty selfishness and regret within the Lin family. When the fog clears, we realize that the most poignant truth is often hidden deep in the heart.