In the spring of 2200, Xin Yuyan's grandfather passed away. In order to continue living a life with her grandfather, Xin Yuyan waited for a time and space hacker to take her back to the past. Finally, she waited for the space-time hacker, but the reunion with her grandfather was not as simple as she thought. She met an energy harvester and was trafficked by the energy harvester group. Grandpa is not what Xin Yuyan thought. Grandpa has many secrets that Xin Yuyan doesn't know. Slowly, the secrets between this and the Energy Reaper Group were revealed one by one, until the moment when Xin Yuyan had to choose...
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