“ALONE” tells the story of Pim who moved from Thailand to Korea to escape the guilt of being the surviving half of a conjoined twin. Flashbacks to Pim’s childhood show how the bittersweet relationship with her sister, and their commitment to stay together forever, transforms into a repressive bond that ultimately leads to a separation. After she returns to visit her dying mother, the spirit of her dead sister angrily thrusts herself into Pim’s life.
There is a belief in Thailand which requires relatives to put coins inside the mouth of the deceased so that they can move on to the afterlife. However, there is a group of reckless and irresponsible teenagers who keep stealing the gold coins from the deceased. Consumed by their own greed, the teenagers then set out to steal from a millionaire’s corpse who had a mouthful of gold coins and their action somehow angers the dead man. Later, the group of teenagers then encounter various horrifying situations as the spirits of the man returns to haunt them.
A group of high school friends reunite after two years when one of their fathers’ committed suicide. They all spend the night at their friend’s place. When darkness falls, strange things begin to happen to them one by one. It is as if someone is using the black arts on them in revenge for an act this group of friends committed together back at high school