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.

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 search for clues to their next target's identity in Tombstone, USA, where they must blend in with the 19th-century gunslinging crowd.

Bon and Yumiko travel over 35,000 years back to the desolate landscape of Beringia to prevent a lone hunter from freezing to death on his trek east.

When a rogue Time Patrol agent murders someone, Bon and Yumiko are determined to stop the crime before it happens and uncover their colleague's motives.