Dr. Stone Wiki
Dr. Stone Wiki

Medusa & Perseus (MEDUSA (メデューサ) & (アンド) PERSEUS (ペルセウス) Medyūsa ando Peruseusu) is the one hundred and twenty-seventh chapter of the Dr. Stone manga.


Ryusui freezes at the controls of the drone, feeling like something's amiss. Senku, currently on the battlefield, feels the same. On a boat somewhere off the island, Ibara waits for Kirisame to throw the Petrification Weapon.

In a flashback, we see that Ibara used the Kingdom of Science's crystal radio earring to listen in on their plans. He tells Kirisame to throw a fake device, hoping to force everyone against him to show their cards.

With the weapon in the air, Senku makes some split-second calculations and realizes that her throw was inaccurate and would catch people on her side too. Senku calls everyone back to the Mobile Lab to regroup. Kirisame notices Moz jolt at the fake device, and asks if he'd betray their master. Moz says nothing but vows to get back at Ibara later. He chases after the Kingdom, ready to kill.

Safely in the lab, everyone rejoices for plan B: using the gun. Except Yo sees that his gun has been stolen by none other than Magma, who is rapidly escaping the mobile lab with Gen in tow. While discussing their plan, the two of them notice that the Perseus has been overtaken by islanders fleeing the island.

With Ibara's plan to petrify the whole island, Senku concocts a counter-plan to take both the Petrification Kingdom and the petrification weapon at once.

Characters in Order of Appearance[]

Chapter Notes[]

  • Ibara tricks the Kingdom of Science with a false petrification weapon.
  • Moz turns on them to cover his involvement.
  • The islanders take over the Perseus.
  • Ibara plans to petrify the whole island.
  • Magma has stolen Yo's gun to kill Ibara.

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Chapters and Volumes
Volume 1 1234567Extras
Volume 2 89101112131416Extras
Volume 3 17181519202122232425Extras
Volume 4 262728293031323334Extras
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Volume 24 206207208209210211212213214Extras
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Volume 26 224225226227228229230231232Extras
Volume 27 Terraforming4D Science: 14D Science: 24D Science: 3
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Story Arcs
Prologue Saga
Stone Formula Arc
Chapters 1234
Episodes 12
Vs. Tsukasa Arc
Chapters 56789101112
Episodes 345
Ishigami Village Saga
Kingdom of Science Arc
Chapters 131415161718192021222324252627282930313233
Episodes 5678910111213
Village Games Arc
Chapters 34353637383940
Episodes 131415
Village Origins Arc
Chapters 4142434445
Episodes 1617
Stone Wars Saga
Vs. Hyoga Arc
Chapters 4647484950
Episodes 1819
Communications Arc
Chapters 5152535455565758596061626364656667686970717273747576777879808182
Episodes 20212223242526272829303132333435
Source of the Petrification Saga
Age of Exploration Arc
Chapters 8384858687888990919293949596979899 100
Episodes 35Ryusui3637383940
Treasure Island Arc
Chapters 101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138
Episodes 4142434445464748495051525354
The Truth of the Petrification Saga
New America City Arc
Chapters 139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169
Episodes 555657
South America Arc
Chapters 170171172173174175176177178179180181182183184185186187188189190191192193
New Stone World Arc
Chapters 194195196197198199200
Globetrotting Arc
Chapters 201202203204205206207208209210211212
Stone to Space Saga
Moon Mission Arc
Chapters 213214215216217218219220221222223224225226227228229230231232