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.

Gus lands under the protection of some new friends as Big Man’s past catches up to him. Dr. Singh fears a nosy neighbor will unearth Rani’s secret.

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.