Unique among many games of this genre, MOTAS features a plot that changes and evolves as the player advances through the course of the game. MOTAS begins in a relatively formulaic fashion; as is the convention in escape the room games, the player awakens in a bedroom that is locked from the outside with no memory of prior events. As the game progresses, the player discovers several elements throughout the game's environment that suggest the player is a clone, such as a letter left on a table in one of the rooms on the seventh level regarding an escaped clone, and a manual about cloning left on a table in the eleventh level, which leaves the player wondering about their existence afterwards. There are also subtle hints throughout the game suggesting that the player may be an alien, such as at the end of level eight the player puts on what is described as an "Alien Suit". Depictions of aliens can also be found throughout the game: for example, on the ninth level the player sees the dead body of an alien lying outside a crashed UFO in the first room.