After being drugged by Hannah McKay, Dexter wakes up in an industrial area outside of town. He knows that Hannah is responsible and she's surprisingly easy to find, which makes Dexter more than just a bit suspicious. It turns out she's living on a luxury yacht with her husband Jacob. She's changed her name to Maggie and says she's quite happy. Her husband doesn't appreciate the fact that she's met with Dexter forcing her to take action and for Dexter to help her out. Meanwhile, Dexter has agreed to teach Zach Hamilton the code - to Dr. Vogel's delight - but he is proving to be a difficult student. When someone close to Dexter is killed, he's certain that Zach is the culprit. Masuka arranges a new job for his newfound daughter.