Over 20 "Mystery & Thrillers" Writing Prompts

In a small lakeside town, during the annual summer festival, a legendary old watch said to belong to the town's founder goes missing. The protagonist and their friends discover a cryptic map tucked inside an old library book, launching them into a thrilling race to find the watch before it's lost forever.

Kids & YA Fiction
Teen and YA Fiction
Mystery & Thrillers

The night before a regional science fair, the groundbreaking project of a brilliant teen inventor is mysteriously sabotaged. Teaming up with a rival competitor, they must navigate a maze of clues and suspects within their own school to find the saboteur and restore the damaged invention before it's too late.

Kids & YA Fiction
Teen and YA Fiction
Mystery & Thrillers

When a notorious graffiti artist who targets only the most secure public buildings suddenly stops, the community breathes a sigh of relief. That is, until a teen discovers that each tagged location was a piece of a larger, sinister plan, and the final target might just be their own high school.

Kids & YA Fiction
Teen and YA Fiction
Mystery & Thrillers

Write a story about a group of high school friends who discover an old, unopened letter in a bottle while cleaning the beach for their community service project. The contents of the letter lead them on a wild adventure to solve a decades-old missing person’s case.

Kids & YA Fiction
Teen and YA Fiction
Mystery & Thrillers

Write a tale about two siblings who find an old camera at a yard sale. When they develop the film still inside, they find pictures of people they don't know in front of their current house, dated 50 years earlier. Each photo is a clue that leads them closer to uncovering a long-hidden family secret.

Kids & YA Fiction
Teen and YA Fiction
Mystery & Thrillers

Create a story where your main character, a teenage amateur coder, receives strange, coded messages on their computer. As they begin to decode the messages, they realize they are being drawn into an online game with real-world stakes, involving a secret society and hidden treasures.

Kids & YA Fiction
Teen and YA Fiction
Mystery & Thrillers

Two teenagers camping in the deep woods stumble upon an old, abandoned campsite with items scattered everywhere, but no signs of the former campers. When they decide to investigate further, they find a riddled diary that leads them on a mysterious treasure hunt—the stakes get higher as they realize they are not the only ones searching.

Kids & YA Fiction
Teen and YA Fiction
Mystery & Thrillers

While working a summer job at a local museum, a group of teenagers stumbles upon a series of hidden messages scrawled in ancient languages on some of the exhibits. As they decode the messages, they uncover a centuries-old secret that some prominent town figures would do anything to keep buried.

Kids & YA Fiction
Teen and YA Fiction
Mystery & Thrillers

At the annual school fair, the fortune teller's tent is the main attraction. But when your character and their best friend get their fortunes told, they're warned about a looming danger within the school's walls. It's up to them to uncover the mystery without tipping off the wrong person about what they know.

Kids & YA Fiction
Teen and YA Fiction
Mystery & Thrillers

Imagine your character receives a mysterious letter that contains only a single clue to their missing sibling's whereabouts. As they follow the trail, each clue delves deeper not only into hidden places in their town but also the secrets their family has buried for years.

Kids & YA Fiction
Teen and YA Fiction
Mystery & Thrillers

Tell your story ✍️📚Captivate readers 😍Start earning 💸🤑💳Tell your story ✍️📚
with Chapterly.

Get 2 weeks free, then pay as little as $9.99/mo. No commitments. Cancel anytime.