After the crew of the Morningstar completes a mission in their typical dysfunctional manner, they set off to Za'Un to collect their reward. When the deal goes awry and the crew finds themselves in peril thanks to Yasuo's drunken escapades, Sona begins to doubt whether she can save them or even herself from the galaxy's sea of criminals and bounty hunters. Will Sona be able to hold her team together, or will they crumble in the Sea of Copper?