Garden of Eden 2099

A laboratory brother had an accident while climbing a mountain. The search and rescue team searched for him for three days, but in the end they only brought back the news that the search had been abandoned and a funeral without a body. Cheng Chen originally thought that he had just lost a talented senior brother. It wasn't until he was sorting out his belongings that he saw an unexpected line of notes in his senior brother's research notes: They're all GONE!