Alexandra is still in danger... Alexandra thought she had escaped MurAdKo, only to find herself with an impossible decision. Torn between people she loves, she is forced to make a choice. Does she make the right one? Meanwhile Tom and Emily continue to unravel the mystery surrounding the sounds in space. Their lives have never been in more danger, as they continue to make discoveries. Their last stop reveals a mystery they never saw coming. Continue with the saga as Flora takes on MAK in Challenger.