- Lupin brings Harry to his office, where he reveals he knows exactly what the Marauder's Map is.
- He chastises Harry for not turning it in.
- In the wrong hands, it could be a map leading directly to Harry.
- Lupin confiscates the map.
- Harry tells him that the map is on the fritz, like when Google Maps takes you the wrong way down a one-way street.
- Harry says it showed Peter Pettigrew, even though he is supposed to be dead.
- According to Lupin, that's impossible.