Heartthrob (2017) Timeline Explained – Every Event in Order

Henry kills Dustin because he becomes consumed by jealousy over Samantha's past relationships and convinced that anyone close to her is a threat to their romance. When he learns about Dustin, one of Samantha's former lovers who remains in her life as a friend, Henry sees him as an obstacle to their relationship. His obsession twists his perception, leading him to believe eliminating Dustin would protect what he has with Samantha. This murder marks the point of no return in Henry's psychological unraveling.

Foreshadowing: Henry's jealousy first emerges when he asks about Samantha's past relationships, foreshadowing his violent reaction to learning about Dustin.

• henry sinclair
• dustin
• kill
• jealousy
• obsession
• murder

Samantha breaks up with Henry because she recognizes his escalating controlling behavior and obsessive fixation, which frighten her. Though she cares for him, she sees that his jealousy and possessiveness are spiraling dangerously. She ends the relationship specifically to push him toward attending MIT, believing distance might free him from his fixation and give them both a chance at separate, healthier lives.

Foreshadowing: Henry's insecurity about Samantha's past was visible early in their relationship, showing the roots of his controlling nature.

• samantha
• breakup
• henry
• mit
• control
• obsession

Henry kidnaps his mother Colette because he believes she is part of a conspiracy to separate him from Samantha. After Samantha breaks up with him to send him to MIT, Henry becomes convinced that external pressures, including his mother's influence, are orchestrating Samantha's departure. He ties her to a chair in his house as collateral, using her as leverage in his distorted logic that everyone is working against his relationship.

Foreshadowing: Henry's conflict with his mother's expectations about MIT was established earlier, showing her role in his life decisions.

• henry
• mother
• colette
• kidnap
• chair
• mit

During dinner at Henry's house, Samantha hears a noise upstairs and discovers Henry's mother bound to a chair. Henry then admits he killed Dustin and presents Samantha with a twisted ultimatum: she must either release his mother or kill her to resolve their relationship problems. When Samantha persuades Henry to release his mother, she escapes through a window. Henry then begs Samantha to run away with him, but she refuses, leading to his devastating final act.

Foreshadowing: Henry's phone call claiming he resolved things with MIT was a calculated setup to bring Samantha back into his control.

• dinner
• confrontation
• mother
• knife
• ultimatum
• escape

Henry kills himself because he cannot live without Samantha and cannot accept that she has chosen to leave him. After his mother escapes and Samantha refuses to run away with him, Henry is faced with the complete collapse of his fantasy of their relationship. He tells Samantha she was different from everyone else, she didn't need someone to define her, then stabs himself, ending his psychological torment.

Foreshadowing: Henry's statement that Samantha was different from everyone else echoes his earlier belief that she was the only person who truly saw him.

• henry
• suicide
• stab
• death
• samantha
• refusal

Samantha keeps Henry's journal secret because it contains their private history together, his genuine feelings and the intimate moments they shared. Despite the traumatic end, she cannot bring herself to discard this tangible evidence of their connection. Her therapist acknowledges the relationship was unhealthy but confirms Henry truly loved her in his own way, leaving Samantha with complicated feelings she chooses not to share with others.

• journal
• secret
• keep
• samantha
• memories
• therapist

The skating rink ending represents Samantha's final reckoning with her complicated feelings for Henry. This was the site of their first date, where Henry brought her to experience joy and connection. Sitting alone on the floor there, she finally speaks the words she never could while he was alive: "I love you, Henry." This confession is bittersweet, she mourns the person he could have been and the relationship they might have had, even though his actions made them impossible.

Foreshadowing: The skating rink was established as the place where their tender connection first began, making it the perfect location for her final farewell.

• skating rink
• ending
• i love you
• memories
• samantha
• regret

Henry's obsession begins as intense romantic devotion after finding someone who seems to truly see him, but quickly transforms into destructive jealousy. Initially, he cherishes the warmth Samantha brings to his quiet life. However, learning about her past relationships triggers insecurity that spirals into possessiveness. The murder of Dustin becomes his point of no return, after which he views everyone around Samantha as a threat. His fixation ultimately encompasses his own mother and ends in suicide.

Foreshadowing: Henry describes Samantha as someone who truly sees him, establishing how heavily he relied on her for self-worth.

• obsession
• escalation
• jealousy
• possessive
• control
• development

Henry invites Samantha to celebrate MIT as a manipulation to bring her back into his life. Though he claims to have resolved things with the university, his real intention is to reunite with her under the guise of good news. This calculated move is designed to lower her defenses and pull her back into his orbit, setting up the dinner confrontation where he reveals his crimes and makes his final demands.

Foreshadowing: Earlier, Henry had chosen to stay in town with Samantha over attending MIT, showing his willingness to use the university as an emotional lever.

• invite
• mit
• celebration
• phone
• trap
• manipulation

Henry's relationship with his mother Colette was defined by pressure and expectation. She pushed him toward MIT and prestigious achievement, creating tension between his own desires and her ambitions. This conflict intensifies when he considers staying in town for Samantha instead of attending MIT. When he kidnaps her, he demonstrates how twisted his thinking has become, viewing even his own mother as an enemy conspiring against his relationship.

Foreshadowing: Colette's strong influence over Henry's future decisions was evident when he was accepted to MIT.

• mother
• colette
• pressure
• mit
• expectation
• kidnap