Finding Serenity

After the events of Pitch Black, Riddick tries to return to the human race for the sake of Jack. They end up on Persephone, after parting from Imam, & board a Firefly called Serenity. A discrete ship, headed towards the outter rim, where they can disappear. Unfortunately others had a similar impression. They end up staying on the ship, as crew. (Andromeda Galaxy, Verse Cloud)