Where to begin...
The plot was definitely pretty interesting, though starting with the ending is starting to get a little cliche...
But the development of the characters and the narrator (through his POV) was well-done, and this 'Ivy' came in and out pretty well, better than most secondary characters are. Was this complete?
There were a lot of characters involved in this, but the use of the 1st person really helped the story come together. The accent was a nice touch, though listening to 'see' got a little annoying.
So, just to wrap everything up, this story is pretty solid. Joey is believable, as well as everybody else. The cliffhanger at the end is a nice place to leave off and kinda gives the sense of a broader story, though I might be wrong on this.
As for improvement: none needed, but if you're going to do an accent, make sure to keep it consistent.