Serious Case: the Mystery of the Substitute

The moat female corpse wears her best friend's dress and drives her best friend's car. DNA said she was Liu Xue. Detective Gao Yuan didn't believe it - Liu Xue was a good swimmer, how could she be drowned? Best friend Mo Linhua discovered that the corpse had steel nails on its wrists, but Liu Xue did not. One body, two truths. The murderer is hiding out of sight of everyone.