Events Last Purify occur after the Third World War. The familiar world has completely changed. Developed countries and cities have long been in ruins. Old states no longer exist. The planet is covered with invisible radioactive ash. The population is a handful. In such conditions, a recently created organization called the Ethics Agency is gaining popularity. It was created by a small group of enthusiasts and intellectuals. The main goal of this public company is to prevent similar situations in the future, to improve life on the planet. In this case, representatives of the agency control and prohibit activities related to atomic energy, environmental pollution, and the use of weapons. In addition, global changes have been made to religious and cultural life.

In Last Purify the user will have to face:

• Controlling the actions of the hero – the player takes control of a guy named Toru. He lives in the newly created state of Ethika.
• The updated world – in the new society there are numerous prohibitions. Many of them look very strange.
• Dealing with conflicts – in some areas there is growing discontent and protests against totalitarian rule.
• Direct the storyline – the player will have to participate in dialogues, selecting the presented phrases and lines. In addition, it is necessary to control the character's actions, make decisions. All this affects the development of events, the ending of the story.