A visit from Vala’s 'friend' Keto results in the Sun Tzu, Daniel and Vala being sent to investigate a rapidly disintegrating ship. Once there, they discover evidence of Ba’al’s experiments – but they’re not prepared for what else he’s left behind. It’s a case of nature or nurture – but will Daniel and Vala make a decision that will save the Sun Tzu or condemn all on board to death?