# WebtoonLib — Dr. Stone #212

## Series
- title: Dr. Stone
- slug: dr-stone-5eb95b

## Chapter
- number: 212
- chapter_key: 212
- release_date: 2025-05-29

### Summary
Disaster strikes the Kingdom of Science's global tour when a critical experiment goes horribly wrong. While testing a Medusa device in a vacuum—a necessary step to prepare for their space mission—the team accidentally triggers a terrifying, unforeseen protocol. The device activates with sonar expert Ukyo Saionji at the epicenter of the event, suggesting their enigmatic enemy, Whyman, has booby-trapped the petrification technology itself with a fail-safe designed to stop humanity from ever reaching the moon.
- summary_source: graph_aggregator
- summary_verification: unverified

### Key events
- A Medusa experiment in a vacuum triggers an automatic activation, revealing Whyman has booby-trapped the devices.

### Characters involved
- Dr. Xeno — character
- Senkuu Ishigami — character
- Ukyou Saionji — character

## Spoiler
- level: auto

### Safe teaser
Disaster strikes the Kingdom of Science's global tour when a critical experiment goes horribly wrong.

### Spoiler summary
Disaster strikes the Kingdom of Science's global tour when a critical experiment goes horribly wrong. While testing a Medusa device in a vacuum—a necessary step to prepare for their space mission—the team accidentally triggers a terrifying, unforeseen protocol. The device activates with sonar expert Ukyo Saionji at the epicenter of the event, suggesting their enigmatic enemy, Whyman, has booby-trapped the petrification technology itself with a fail-safe designed to stop humanity from ever reaching the moon.

## Status
- data_status: complete
- summary_status: generated
- transcript: Hardsub chapter — image-only

## See also
- [WebtoonLib — Dr. Stone #212](/series/dr-stone-5eb95b/chapter-212)
- for_series_detail: /llms-series/dr-stone-5eb95b

## Usage
AI grounding / search / summarization. Cite WebtoonLib for any included content.