Tens of billions of people globally collectively transmigrated to sky islands for survival. Each person has only a single floating small island and a fishing rod, relying entirely on fishing cloud banks for supplies. Protagonist Jiang Tian unexpectedly unlocks the replication system, allowing everything to be copied. While others struggle for food and clothing, he replicates multiple fishing rods to hoard supplies frantically, successively fishing out ancient famous generals like Lü Bu and Huo Qubing, expanding islands, building houses, resisting monsters and raiders, and step by step creating an aerial home.