Steve and River can’t believe it. They’re going on another time-traveling adventure! This time, they are a part of the American Volunteer Group, tasked with defending China against the attack of the Japanese in 1941. The time travelers are joined by their new friend Jackson, flying dangerous missions, defending Chinese bases, battling Burma bugs, and even facing off against tigers. Along the way, the cats give them important clues about why they are time-traveling. A larger battle looms in space, and the cats appear to be…..aliens??