-Rest of the movie sucks
The heart of Dragonfly is about a man grieving for the loss of his wife. Certain events in his life make him begin to think that his wife may be alive and trying to reach him. Done properly, this could be a touching, suspenseful movie, but here, Dragonfly drags on increasing in implausibility.
Costner is coping for the loss of his wife Emily by throwing himself into his work at a hospital. Emily worked in the pediatric oncology ward of the same hospital, but died helping sick people in South America. Strange things begin happening to Darrow. Emily's 'avatar' was a dragonfly, since she had a birthmark shaped like one on her shoulder. Now, everywhere Joe goes, he begins to see them, real or imagined. Children in the oncology ward start drawing what looks to be like a squiggly cross, which may also resemble a dragonfly. Emily's parrot begins speaking as if she arrived home. But Emily is dead which means that Joe is crazy. Joe's behavior becomes increasingly erratic as children he never knew seem to know that he's "Emily's Joe," and that squiggly cross appears more often. He comes to believe that she is trying to reach out to him, and he needs to find a way to contact her. As the third act nears and Joe decides to find Emily, Dragonfly loses all sense of logic and turns almost into an action movie.
Everything in Dragonfly is overbearing. There is a twist at the end, which makes perfect sense looking back at the beginning. Still, this 'twist' is dull enough that it makes no difference one way or another.