When the Emperor of China issues a decree that one man per family must serve in the Imperial Chinese Army to defend the country from Huns, Hua Mulan, the eldest…

As polar night looms, Gus and his crew arrive at the outpost — but they’re not alone. To find Birdie and the cave, they must brave several obstacles.

After a daring rescue, Gus meets an individual well-versed in hybrid history. Amid emotional reunions and eerie revelations, all roads lead to the cave.

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.

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’s quest to find Birdie and uncover more about her connection to his father leaves him questioning everything he’s ever known.

His world shaken, Gus runs off and makes a rash decision. Big Man comes to grips with long-ago mistakes. Aimee makes a last stand against General Abbot.