The conflict of this story is man vs. self. The story deals with Jessie's realization that she was kidnapped as a young child and her family is not actually her own. She has many interactions and even problems with different characters throughout the story, but the plot is dominated with her attempt to deal with what happened to her. Her struggle with herself to cope and understand is what moves the plot forward, and is therefore the central conflict.
I agree with sullymonster's answer although Jessi is a HIM not a HER. fyi.