Popular TV anchorwoman & late night DJ Ko Sun-young set to host her final radio program. During the show, she receives a startling text message instructing her to follow specific directions or endanger the lives of her family.

So-yeon suffers from claustrophobia and inherits a Persian cat when its owner dies. She begins having nightmares and people around her begin dying as she searches for the truth.

In the not-so distant future, researchers at a deep-sea laboratory have finally invented a time machine. Head researcher Woo-seok is promised funding from a mega-corporation if he completes a test flight. He and Young-eun carry out the mission and travel to 11 A.M. the next day, only to find the base on the verge of collapse. All the researchers are gone and someone is out to kill them.

While trying to solve a murder case, a cop starts to have doubts about his partner's involvement.