[Satou looks up from the tattered and worn book in her hands. She can't even explain how they got into the past, let alone why they've been sent here. Magic hasn't been able to properly tackle the secret of timetravel, after all...

Gently putting the book back, Satou muses aloud;]

Usually when you retrace your steps in a mystery, it's because you suspect that there's a detail in the past that influenced your present circumstance...

Perhaps there's something here that we're supposed to learn that will help us in the 90s?