They didn't get Katniss this time, they followed her promise instead. She never knew the pain it would leave her to. The pain makes her question reality as she tries to get help out of there.
Katniss is home in Twelve, after her Trial, barely making it through the nightmares and haze of pain. And then Peeta shows up, determined to settle down and try to regain his memories. But Katniss doesn't want him there, doesn't want to see him....or does she?
(This story fills in gaps in the ending or Mockingjay.)