AI mystery story maker
Make AI mystery and thriller Shorts
Voicemails from tomorrow, a town that forgot the same day, cold cases nobody solved. Type the mystery and Slice turns it into a suspenseful Short with narration, captions and music.
200 free credits · no card needed
Made with Slice — straight from the idea, no editing
Start from one of these
Tap an idea to open it in Slice, ready to change and make.
A voicemail from tomorrow
A mystery story: a woman finds a voicemail dated tomorrow, in her own voice, whispering: 'Don't get on the 8:15 train. And don't trust the man in the grey coat.' The next morning on the platform, a man in a grey coat says her name. End on a cliffhanger.
Use this idea →The forgotten Tuesday
A mystery thriller: everyone in a small seaside town wakes up having forgotten the same day. Every house has a new photograph on the wall that nobody remembers taking, all showing the same stranger. A detective narrator lays out the clues and asks: who is he?
Use this idea →60 seconds to choose
An interactive thriller: you wake up in a locked room with two doors and a timer counting down from 60. Behind one door is the way out. The narrator gives three clues, then stops at 3 seconds and asks the viewer: left or right? Comment your answer.
Use this idea →The case nobody solved
An unsolved mystery: in 1872 the Mary Celeste was found drifting in the Atlantic with no one aboard, food still on the table and the lifeboat gone. Lay out the clues and the main theories, and end with: what really happened to the crew?
Use this idea →The last guest
A murder mystery: five guests at a snowed-in mountain hotel, one dead host, and a clock that stopped at 11:52. The narrator introduces each suspect and one clue each. End with 'One of them is lying. Who did it?'
Use this idea →How to make a mystery Short with Slice
- Write the setup in a few sentences. The strange thing that happened and the question it leaves. "A voicemail from tomorrow, in her own voice, warning her about the 8:15 train" is enough.
- Pick a style. Cinematic for modern thrillers, Noir for detective stories, Vintage film for old cases.
- Tap Generate. Slice writes tense narration, generates moody scenes and adds captions and music.
- Change anything — a clue, a scene, the final line — then post it.
Tips for mysteries people can't skip
- Open on the strangest detail. The thing that shouldn't be possible goes in the first second.
- One clue at a time. Let viewers play detective alongside the narrator.
- End on a question. "Who is he?" or "Left or right?" gets people commenting their theory.
- Want it scarier? See horror stories. Want more parts? See making a series.
Questions
Can Slice make mystery and thriller videos?
Yes. Give it the setup, the strange thing that happens and the question you want people asking, and Slice writes tense narration, generates moody cinematic scenes and adds captions and music.
How do I keep people watching to the end?
Start with the strangest detail in the first second, give one clue at a time, and end on a question or a cliffhanger. Asking viewers to comment their theory brings them back for part 2.
Can I tell real unsolved mysteries?
Yes — historical cases and famous mysteries work well. Stick to what's known, and present theories as theories.
Which styles fit a mystery?
Cinematic for modern thrillers, Noir for detective stories and Vintage film for old cases and archive footage.
How long can a mystery be?
Up to 2 minutes. The free trial makes videos up to 15 seconds; most mystery Shorts work best at 30–60 seconds.
Your first one is free
Type the idea, and Slice writes, animates, voices and captions it in a few minutes.
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