Lucius notices his grandfather's bathhouse has lost clients due to some foreign soldiers making bad use of the place. When confronting them he slips back to modern Japan where he tries to defend a peaceful bathhouse against a trio of rude tourists. After a useless fight, both the roman and the tourists learn that the rules are shown in the place as pictures, something that Lucius takes back to Rome and helps him allow the foreigners to make good use of the place.