Thank you all for your comments.
The hook is designed to be in less than 140 characters (A single tweet)
Below is the updated twitter hook:
A reclusive banker’s reality is rattled when Mythology becomes real and he has to choose between a manipulated life and a galactic civil war
A detailed hook would be
A reclusive banker’s seemingly perfect life is rattled when Mythology become real, Gods become aliens, and when he learns about his responsibility to save the galaxy from an impending civil war. Now he has to choose between living a deception, and letting billions die.