How is it possible for a movie nowadays to wring so many unsettling jump scenes from one simple premise? With Alone, directors Banjong Pisanthanakun and Parkpoom Wongpoom prove that their remarkably scary freshman effort, Shutter, was no fluke. This time they push their character-based horror in a different direction, centering the story on a woman named Pim (Masha Wattanapanich). Pim was born as a conjoined twin, but her sister Ploy died after the two were successfully separated. Pim married her sweetheart Vee (Vittaya Wasukraipaisan) and moved to South Korea.
As the film begins, Pim is celebrating her birthday. One of her party guests pulls out a deck of fortune-telling cards and informs Pim of good news: something she has lost will soon return to her. Then Pim receives bad news: her mother in Thailand has suffered a stroke. Pim and Vee rush home to help out. Almost as soon as they arrive, Pim begins seeing frightening apparitions of her dead sister. Pim has always blamed herself for her sister's death because she was the one who insisted upon the separation of the twins. Pim had fallen for Vee and yearned to marry him, while Ploy wanted to remain connected to her sister forever.
Great premise, right? Instead of a long-haired girl or "I see dead people," you see one person, your long-gone sister, over and over again, evidently wanting to be reunited with you in more ways than one. We all know how family members can haunt us long after they're dead and buried, how old arguments and grudges and resentments keep surfacing, trying to claw their way into our present lives. Vee sees this happening to his beloved wife and he does what any reasonable man would do: he gets an old school pal, now a psychiatrist, to pay Pim a visit.