Exciting thriller with a twist ending The movie takes you through the tragic and devastating life of Kya, aka the Marsh Girl, and legally known as Catherine Danielle Clark. As an adult, and in present current events of the movie, she is accused of the murder of Chase Andrews.
Abandoned by her mother and siblings because of an abusive father, Kya is torn between leaving or staying. Eventually setting a rhythm of hiding from her father, then learning to live peacefully with him, the father decided to leave Kya after receiving and cruelly burning a letter he received from the mother after she left.
Kya continues to fend for herself. Her only saving Grace are her drawings, the grocery owners, and Tate, a new friend she discovers who teaches her how to read. Everyone else in the town rejects her, so she continues to isolate herself in her marsh home - a dilapidated, broken home that shelters her and her beautiful drawings.
Tate and Kya fall in love, but eventually drift apart as Tate confides in Kya that he is ready to leave for college. He promises to return to Kya, setting the date of the 4th of July. When he breaks that promise, Kya is devastated yet again, feeling abandoned and heartbroken.
Fast forward five years later, and she meets Chase Andrews, an attractive young playboy who, despite his upbringing, fancies this Marsh Girl. It is apparent that he is a polar opposite of Tate's caring, compassionate being - Chase is lustful and wants to be with Kya only to benefit himself. He shows her the dangerous fire tower, and she is overwhelmed with emotions at seeing the beautiful marsh land below. It is revealed there is a dangerous, open grate at the top floor of the fire tower.
Tate then returns the following year, but having broken his promise to Kya, she is unwilling to see him and upset with having encountered him. Tate only wants to warn Kya of Chase. It is then revealed that while attempting to be with Kya, he was engaged the whole time to one of his "friends", Pearl.
Kya again, is devastated and feels abandoned. Eventually she decides to warm back up to Tate, as they both realize he never should have left her. He confesses that he made a huge mistake at being too career-driven, because none of it meant anything if he didn't have Kya to share that life with.
Then fast forward a bit to present time, and we are back to the murder trail. Kya is acquitted for the murder, as there is not enough evidence supporting that claim. But one huge question remains - if she didn't do it, who did? And where is the shell necklace she made Chase?
Tate and Kya, happy at the results of the trial, fall into bliss with one another, eventually marrying and starting their lives together. In a twist ending, it is then revealed that Kya indeed murdered Chase, as his shell necklace was found buried in one of her books. After Kya's passing, Tate is shown finding the shell necklace. Terrified of the truth, he then takes the shell necklace and ensures the marsh engulfs it, never to be found again.