The Lost Children of Atlantis

Could these be the ramblings of a nutcase or could this seemingly far-fetched story about "lost children" actually be true?

Mira Cullen, an attractive young doctor and psychic, meets old, sick, occasionally delusional Stefanie Brussels. Stefanie claims to know otherwise unheard-of facts as related to the shocking catastrophe of long ago where so many had perished, but no one in their right mind believes her. She also mentions an artifact in her possession that holds "special powers". Will Mira take anything she says seriously and if she doesn't, what is bound to be the outcome?