Gus and Big Man pick up a traveling companion who suggests a perilous shortcut. Aimee’s sanctuary comes under threat. Time’s running out for the Singhs.

Eager to send Gus on his way, Big Man figures out how to hide him in plain sight. The Singhs attend a neighborhood party that takes an ominous turn.

Gus follows a reluctant Big Man into the unknown. Dr. Singh discovers what it will cost to save Rani. Aimee finds a new beginning after the world ends.