Complex sentence: Returning to Bayport, the boys overhear a plot to steal the satellite camera the very next day, but they are captured and taken aboard a ship where they are locked into a hold being filled with water.
Split into simpler sentences: Returning to Bayport, the boys overhear a plot to steal the satellite camera the very next day. But they are captured and taken aboard a ship where they are locked into a hold being filled with water.