While at his friend's home, Bon Namihira accidentally witnesses time travel in action and finds out that to keep it a secret, he must be erased.

After narrowly escaping erasure, Bon must learn the ropes of being a Time Patrol agent. His first mission: 1947 Tokyo in the midst of Typhoon Kathleen.

Bon and Ream go back 350 years, arriving in Southern France to prevent the torture and death of Celine, a potential victim of Europe's witch hunts.

Bon and Ream become stranded in the future while on a dangerous mission to rescue a "Time Tripper." Will they be able to find their way back home?