Year 1994 – Sans Gaster is born to Windings Gaster and Arial Gaster.
Year 1995 – Prince Asriel Dreemurr is born to king Asgore Dreemurr and queen Toriel Dreemurr.
Year 1996 – The barrier that cages the monsters in under MT. Ebott is destroyed. The humans, not having seen monster for several hundred years, gets shocked of them being still alive. As all magic in human kind have disappeared the humans gets afraid and suspicious of the monsters' power. An investigation on how far the magic goes takes place, and all the monsters are moved to a quarantine zone. Most belongings are confiscated. The monsters are not allowed to mingle with humans in any way of fear of conflict.
King Asgore Dreemurr and queen Toriel Dreemurr are appointed as the representatives for the monsters, and are the only ones to leave the quarantine. Even so, the pair are only to be outside the quarantine on a very limited basis. A discussion between the humans and the monsters starts. The discussions start poorly because of the humans' fear of them.
A makeshift hospital is set up, but many of the medical equipment and medicine have been confiscated. That they have neither electricity nor running water doesn't help. A certain amount of food is contributed to every monster family once every month, but it's very little.
Year 1997 – A combined school and preschool within the quarantine is founded for the monster children. School supplies and toys are scarce, due to most of that kind has been confiscated.
Sans Gaster starts to go to the combined school and preschool that is within the quarantine.
Year 2000 – Angry riots within the quarantine starts to fire up as the discussions with the humans goes slow. The monsters want out of the quarantine, but they are refused by the human. After a public speech to his people within the quarantine, king Asgore Dreemurr is able to calm the monsters down a bit after a few months riots. The disorder goes down even further when queen Toriel Dreemurr takes several trips around the quarantine and makes sure that everyone are alright.
Sans Gaster starts to show magic abilities. Most prominent is his ability to teleport. Windings Gaster and Arial Gaster warns his son not to ever teleport outside the quarantine zone in fear of what the humans might do to Sans. Otherwise the two parents start to train their firstborn to protect himself with magic.
Year 2005 – Papyrus Gaster is born to Windings Gaster and Arial Gaster. Arial Gaster dies giving birth to her second son, due to infection and to too little medical equipment.
Year 2006 – One night, due to an accident within the quarantine, a fire starts. It kills and injures a lot of monsters. With the help of magic the monsters successfully puts the fire out. The humans didn't help, even though they had the recourses and the men to do so. This only fuels the anger that the monsters have for the humans, but even so king Asgore Dreemurr and queen Toriel Dreemurr tries to stay positive and tries to the best of their ability to keep their people calm.
Year 2007 – Humans starts to take monsters away in different raids, not telling anyone neither where they are taken nor why. In one of these raids Windings Gaster is taken, leaving Sans Gaster and Papyrus Gaster without any parents to take care of them. Sans Gaster, now 12 year old, starts to take care of himself and his 2 year old brother.
Year 2008 – Present year. Sans Gaster, 13 years of age. Papyrus Gaster, 3 years of age.