Jail House Lock! (story arc)

Jail House Lock! (！) is the nineteenth story arc in Stone Ocean.

It narrates Jolyne's predicament as Jail House Lock makes her unable to remember three new pieces of information.

Summary
A transformed Pucci leaves the prison, having no use for it anymore. DIO's entire plan is revealed. Most importantly, the plan depicted that Pucci needs to head for a very precise location—North latitude 28 degrees, 24 minutes, West longitude 80 degrees, 36 minutes. Having read Jotaro's Memory Disc, Jolyne asks Emporio to help her escape Green Dolphin Street. However, Emporio says that escape is impossible due to the "true guardian of Green Dolphin Street", who can make escape impossible, even for Stand Users.

Miuccia Miuller, also known as Miu Miu, approaches Jolyne with her Stand fully revealed, warning Jolyne not to do anything stupid. Jolyne attacks Miu Miu, but suddenly finds herself in her regular cell. Jolyne is affected by Jail House Lock and cannot memorize more than three pieces of information at a time. Though she tries to reach Emporio, she is heavily handicapped by this power.

Meanwhile, Emporio is also caught and trapped in his room, unable to remember how to escape. Jolyne manages to reach the ghost room, but they are caught up by Miu Miu. When Jolyne is given a picture in binary of Miu Miu, Jolyne manages to defeat her after using her to neutralize the guards.

In a supermarket, a woman and her baby are shopping. As they leave the supermarket, the baby sees a cross on a hat and tries to reach for it, making the woman drop her bag as she secures her child. Enrico Pucci, the one wearing the hat, manages to catch all of the items and give them back to the woman, to his own astonishment. Looking unwell, Pucci ponders DIO's plan as he leaves. The mother's wristwatch accelerates unnaturally as she looks at her baby, whose left half has developed into a fully-grown man's.

Jolyne and Emporio hold Miu Miu hostage at Green Dolphin Street Prison, surrounded by armed guards. The guards aim for Jolyne but forget who they were aiming for shortly afterward; Jolyne has forced Miu Miu to use Jail House Lock on her subordinates. Jolyne and Emporio pick up Ermes along the way, and the three break free of Green Dolphin Street Prison without a hitch.

Chapters

 * 096 (690). 
 * 097 (691). 
 * 098 (692). 
 * 099 (693). 
 * 100 (694). 
 * 101 (695). 
 * 102 (696). 

Volumes

 * 11 (74). 
 * 12 (75). 

Anime Episodes

 * 023 (175). 
 * 024 (176).