Character Relationship Map: Obsessed

Characters

• Derek Charles (played by Idris Elba) — protagonist

  A finance employee and devoted husband who repeatedly rejects the obsessive advances of a former temp, Lisa. After being drugged and falsely accused of an affair, he endures a family separation, recon...

• Lisa Sheridan (played by Ali Larter) — supporting

  A former temp who misinterprets Derek's friendliness as romantic interest and becomes dangerously obsessed. She stalks him, attempts to seduce him, spikes his drink, fakes a suicide to claim an affair...

• Detective Monica Reese (played by Christine Lahti) — supporting

  A police detective investigating Derek's alleged infidelity. She questions Derek and quickly grows skeptical of Lisa's claims due to inconsistencies in her story. She arrives at the Charles residence...

Canonical Relationships

Family, romantic, and professional connections based on plot evidence.

• Derek Charles → Detective Monica Reese (Professional Investigator And Subject) — Monica investigates Derek while gradually recognizing that Lisa's story is unreliable.

  Detective Monica Reese questions Derek about his fidelity after Lisa claims they had an affair. She later alerts herself to the emergency and rushes t...

Story Dynamics

Alliances, conflicts, and narrative interactions that evolve throughout the story.

• Lisa Sheridan → Detective Monica Reese (Conflict Skeptical Witness) — Monica's investigation undermines Lisa's attempt to control the narrative.

  Monica questions Lisa's claims and becomes skeptical because of inconsistencies in Lisa's story.

• Derek Charles → Lisa Sheridan (Conflict Target Of Obsession) — Derek is the unwilling target of Lisa's escalating obsession.

  Lisa interprets Derek's friendliness as romantic interest and repeatedly pursues him despite his refusals. She later stalks him, breaks into his home,...

Story Analysis

A devoted husband struggles to protect his family from a former temp whose mistaken attraction becomes violent obsession.

Plot Progression

1. A Dangerous Misreading — Derek's ordinary friendliness toward a temporary worker is misread as romantic interest. Lisa's advances intensify from office behavior to unwanted pursuit outside work.
2. The Conference Trap — Lisa continues contacting Derek after quitting and appears at his work conference. She drugs his drink and follows him into his hotel room.
3. A Ruined Reputation — Lisa's staged suicide attempt and false affair claim create suspicion around Derek. Monica detects inconsistencies, but Derek is still forced out of his home.
4. The Family Under Siege — Derek reconciles with his wife, but Lisa escalates by entering the house and taking their child. The damaged bedroom and missing portrait reveal the depth of her fixation.
5. The Attic Reckoning — Lisa breaks into the home during an alarm-setting mistake and pursues Derek's wife into the attic. The confrontation ends with Lisa's fatal fall and Monica's arrival.