Midnight at the Manor

**Setting**: An isolated, grand manor on the outskirts of a small English village, present day.

**Main Characters**:
- **Detective Elizabeth Harper**: A sharp and intuitive detective known for solving complex cases.
- **Sir Reginald Thornton**: The wealthy and influential owner of the manor, found dead at the beginning of the story.
- **Lady Evelyn Thornton**: The victim's elegant but enigmatic wife.
- **James Thornton**: The estranged son with a rocky relationship with his father.
- **Dr. Clara Reynolds**: The local physician and family friend with secrets of her own.
- **Oliver Stone**: The loyal but mysterious family butler.
- **Sophia Clarke**: A young and ambitious journalist investigating the Thornton family.

**Plot**:
1. **The Crime**: Sir Reginald Thornton is found dead in his study late at night, seemingly from natural causes. However, Detective Elizabeth Harper, called in by an anonymous tip, suspects foul play.
2. **Investigation Begins**: Elizabeth interviews the family and household staff, uncovering strained relationships, financial troubles, and hidden affairs. Each character has a potential motive.
3. **Clues and Red Herrings**: Elizabeth finds a series of cryptic clues - a torn letter, a hidden safe, and an overheard argument. She navigates through red herrings and false alibis.
4. **Uncovering Secrets**: It is revealed that Sir Reginald was involved in shady business deals and had a falling out with his son over inheritance issues. Lady Evelyn is caught in a lie about her whereabouts.
5. **The Twist**: Elizabeth discovers that the murder weapon was a rare poison. Through meticulous investigation, she learns that Dr. Clara Reynolds had access to the poison and a motive tied to a past scandal involving Sir Reginald.
6. **Confrontation and Resolution**: Elizabeth confronts Dr. Reynolds, who confesses to the crime, revealing a deeply personal vendetta. Dr. Reynolds is arrested, and the family begins to cope with the aftermath of the revelations.