Season 1

Hong Jihyo tries her best to dismiss the return of the strange creature in her life, until its signal for attention becomes impossible to ignore.

Unable to find any sure leads to locate Lee Siguk, Jihyo turns to a community of UFO buffs where she's given a hostile welcome.

Huh Bora offers to help Jihyo as long as she's able to document the investigation for her video series. The two make their way to Siguk's apartment.

After getting into a tiff, the two friends go their separate ways. Jihyo turns to the police while Bora tails a suspicious real estate agent.

After a surprising find in a stolen hard drive, Jihyo and Bora sneak into the back of a car and end up near a secluded home.

Jihyo and Bora face a series of delays on the way to a psychiatric hospital. Kim Byungjo and Oh Sehee ask a former detective about a mass suicide case.

Moon Hyungtae tries to get information out of Jihyo by strapping her to a device that distorts the subconscious. Seo Hwajung attempts to meet her savior.

Jihyo revisits the site of the close encounter and turns to her family for more clues. Kim Chanwoo brings a hostage into Cafe Universe.

Preparations for the funeral are well underway until the Hosanna makes a surprise appearance. An old colleague reveals the details of Hyungtae's past.

Hyungtae’s unsettling confession catches Jihyo unawares, putting her in great danger. Bora chases after a mysterious flying object.