Ad Vitam takes place at an unspecified point in the future. Given the ages that multiple characters profess to be, however, it is clearly at least a couple of centuries into the future. Scientists have discovered away for Humans to live indefinitely through the use of "regeneration", a process that turns back the clock on the body's cells.
Years prior to when the series takes place, a large group of "minors" (anyone under the age of thirty) apparently commit suicide. They all have a tattoo on their arms that consists of two dots. The repetition of this event at the beginning of the story prompts involvement from a detective who, among other things, solicits help from a woman who was previously in the suicide cult but clearly did not go through with it.
