Kwang-yeol is placed in the mental hospital for no reason as soon as he comes back to Korea after studying abroad. He manages to escape from the hospital and the continuing mysterious incidents puts him in the train headed to Yeosu. On the train, Kwang-yeol comes across the detective Yu who shows him the picture of his twin brother Bong-yeol on the newspaper. He attends the Bong-yeol's funeral service and goes into Bong-yeol's house to run into Sul-hi, Bong-yeol's wife. Mystery is solved and Hye-young, the committer of all evil deed, commits suicide.
Veteran buttoned-down LAPD detective Roger Murtaugh is partnered with unhinged cop Martin Riggs, who -- distraught after his wife's death -- has a death wish and takes unnecessary risks with criminals at every turn.
Test pilot Tuck Pendleton volunteers to test a special vessel for a miniaturization experiment. Accidentally injected into a neurotic hypochondriac, Jack Putter, Tuck must convince Jack to find his ex-girlfriend, Lydia Maxwell, to help him extract Tuck and his ship and re-enlarge them before his oxygen runs out.