If you are looking for a plot based on another space and dimension, Dark is an apt choice. Dark is well built timetravel webseries that is now streaming on netflix. The story deals with a place Windon, where something unusual happens. Missing children is often seen in this place without any trace. But the twist of the story is that the missing children and undergoing timetravel through a cave near Windon forest to an year 33 years behind. The story explains about a phenomenon of "33 years cycle" where things happen again and again every 33 years. They highlight the quotes "beginning is the end and the end is the beginning". Characters of this film have a unique bond in such a way that they are related to each in in many different ways. This is one of the key point of this webseries. Watching this will make you think into deep about timetravel and other phenomenons. Watch and enjoy