[5][6] Cha Tae-hyun found his role challenging, especially because it required him to smoke cigarettes, which he does not do in real life.

Meanwhile, Sang-man meets nurse Jung Yun-soo (Kang Ye-won) at the hospital, becomes attracted to her, and feels the urge to flirt with her, but does not.

Yun-soo's father dies, and his ghost asks Sang-man to deliver a message to her, along with a gift that he wanted to give her before his death but could not.

However, he gains a new appreciation for his life as he thinks upon how he helped the ghosts and his friendship with Yun-soo, and abandons his suicide plans.

She tells him of a patient that recently died, a boy who lost all memories of his parents from extreme shock.

He runs to his apartment, fully recalling the true identities of the ghosts: his father was the smoker, his grandfather the old man, and his older brother the kid.

The movie ends with a series of photos taken of Sang-man, from his school days, his graduation, to his wedding with Yun-soo.

In the post credit scene, Yun-soo finds the photos and remarks on how he is alone in most of them, as she cannot see the ghosts in the picture.

The remake rights was bought by American film production company 1492 Pictures in February 2011, with Chris Columbus and Adam Sandler reportedly attached.