Lee Ji-hwan (Cha Tae-hyun) receives photographs in the mail that reminds him of how he met two girls, Shim Su-in (Son Ye-jin) and Kim Gyeong-heui (Lee Eun-ju), one summer five years ago. He shares his memories with his friend Cheol-hyeon (Park Young-woo). He recalls initially being in love with Su-in, but she rejects him. Throughout the summer, the three remain friends. Ji-hwan and Gyeong-heui develop feelings for each other but are reluctant to admit it. Ji-hwan recalls the complex relationship between the three to Cheol-hyeon.
A rare mutation has occurred within the vampire community - The Reaper. A vampire so consumed with an insatiable bloodlust that they prey on vampires as well as humans, transforming victims who are unlucky enough to survive into Reapers themselves.
A criminal who runs a brothel becomes obsessed with a beautiful college student. When she rejects him he sets her up by introducing her to a loan shark and when she can't pay, she is forced into working in the brothel.
Twenty-eight days after a killer virus was accidentally unleashed from a British research facility, a small group of London survivors are caught in a desperate struggle to protect themselves from the infected.
Kay and Jay reunite to provide our best, last and only line of defense against a sinister seductress who levels the toughest challenge yet to the MIB's untarnished mission statement – protecting Earth from the scum of the universe.