Stranger on a Train

Are there bounds of human behavior that you will not cross, or arent there? What someone may believe in and subsequently do as acceptable, another may find despicable.
Paul Autore, an aspiring novelist, meets Marcus Varro on a train. Later Paul receives two unusual letters from Marcus inviting him to Sanibel Island, Florida, to tutor Anne, Marcuss beautiful daughter.
Even before he arrives at the spacious white mansion, Paul suspects something else is up; and when he and Marcus almost die from an automobile accident on their way to the Varro residence, tensions rise even further.
Simmering family hatreds heat up and put Paul in the middle. Caught up in things shockingly different than what he has ever written about or experienced, he might have to cross a boundary he never thought he would.
Is Paul prepared to go to extreme lengths to protect himself? How far would you go?