An intruder lurks outside a mansion as Emily and her mother watch TV. They are still reeling from Emily's father's sudden death. Emily has withdrawn, and her mother is concerned her daughter is not popular.At school, Ms. Vivica A. Fox plays a teacher who wants Emily to apply herself. Ms. Vivica A. Fox also meets a new student with a long hair cut named David. Emily and her only friend Michelle plan her sad birthday party. (Which happens to fall on Valentine's day.) Ms. Vivica A. Fox plays matchmaker and sits David and Emily next to one another in class. David and Emily talk philosophically about history. "If you don't know you're history, you'll be doomed to repeat it." They plan a coffee date... as friends.Emily's mom is overjoyed for her daughter and tries to look at her texts from David. The text are pictures of food to entice her to go to coffee with him.At coffee, David and Emily bond over losing their father's. David's mother is also dead.Ms. Vivica A. Fox then gives a history lesson about Valentine's day. She is rudely interrupted by a girl giving out roses, and she has one for Emily from David. He literally asks her if she will "accept this rose,"At Emily's Valentine's birthday party, David shows up with flowers for Emily and her mother. Michelle starts flirting with David, and Emily starts to think he is into her BFF. When Emily tries to kiss him, he turns his cheek and tells her he wants to take things slow. (Then he creeps outside her windows and watches her all night and even the next morning.)Emily notices David creeping outside and confronts him. He has an excuse, but she is unsettled. At school, he stalks Emily more and acts jealous and possessive of Emily. (Demanding to see her text and grabbing her arm.) He also pushes a poor kid named Peter, who asks Emily for class notes. The guidance counselor (Meredith Thomas) sees the altercation and steps in. She warns Ms. Vivica A. Fox about David and flat out says she doesn't like him.David shows up at Emily's mom's workplace. His ambush puts off Ashley, not to mention it is in the middle of a school day. Ashley calls Ms. Vivica A. Fox to see if David is, in fact, a creep. Ms. Vivica A. Fox reassures Ashley.Michelle and David hook up in a car. I'm not sure why. The guilt overcomes Michelle, and she breaks down to Emily. Emily kicks her ex-best friend out and cries to her mother.Emily comes home from school and finds David in her living room. Emily isn't concerned about that and more worried about him cheating with Michelle. Ashley intervenes and sets some clearly needed boundaries.The counselor finds Emily in the hallway and checks in with her. Then she confronts David and tells him that he is a problem and will call the police.Mrs. Stein, the counselor, gets a call from the college recruiter to complain about David. She takes the call in a parking lot at night. David sneaks up on her a stabs her.Emily and Michelle make up while David watches from a bush. Then a random girl comes up and tells the girls that Mrs. Stine is dead. Emily goes home and ignores multiple texts from David. She tells her mother what is going on, and Ashley decides it is time to talk to the police. (Especially when she sees David on the security camera.) Ashley confronts David and tells him to leave her daughter alone. David breaks into Ashley's office and wrecks the place.Michelle and Emily create a plan to get David's school records. She calls his old school, and they are not forthcoming. With no other options, Emily goes solo to break into David's apartment. Emily finds David's laptop and learns that his mother committed suicide and he was in a mental institution. She also learns that they have the same father. David almost catches Emily, but she manages to getaway.Emily tells her mother about what she learned as David bangs on the door. The police arrive and scare him off. Ashley checks to make sure Emily and David didn't hook up. The cop checks the house out and gives them the all-clear. Then he is attacked by the pool. David sneaks up on Ashley and holds a gun to her head.Emily comes home to find her mother bound and gagged. David tells her that he will kill them all if she doesn't cooperate with him. He explains that he wishes Ashley was his mother so he didn't have to grow up abused. His mother went off the deep end and killed herself after learning about Emily's father's death. David had a nervous breakdown. Once he was out, he wanted to get his revenge on Emily and Ashley. Manipulating them so they would feel the pain that he felt while growing up without a father. David plans on killing them and them himself after one family dinner together. Emily and Ashley try to reason with him. While he is distracted Ashley unties herself and chokes him out. Emily grabs the gun and shoots her half brother while he screams at her and calls her his "funny Valentine." (thanks to lifetimeuncorked)