The show's plot pits these characters against various criminals and schemers, Alliance security forces, the utterly psychotic and brutal Reavers, and the mysterious men with "hands of blue" who are apparently operatives of a secret agency which is part of the megacorporation referred to in the DVD commentary only as The Blue Sun Corporation. The crew is driven by the need to secure enough income to keep their ship operational, set against the need to keep a low profile to avoid their numerous adversaries. Their situation is greatly complicated by the divergent motivations of the individuals on board Serenity. The show's brief run did not allow full elucidation of all the complex interrelationships of the cast and their external contacts.