I liked the introduction a lot. It gave you just enough to know what to expect from the characters, but not a lot of detail about what was going to happen. There was not a big cliffhanger like some prologues have which is nice. I feel like that sometimes leads you into thinking a specific way about the book. This told us the characters are not good people, but it did not explain why.
Chapter one dove right in to the story line and did not waste time with a lot of backstory. I assume the book will be written either in dual timelines or with flashbacks to explain how the characters got to be how they are.