S1.E1 ∙ Episode #1.1

Coming from two different backgrounds, Gong Ryong and Eve Kim embark on a space mission. However, problems arose after they launched, endangering the expedition

S1.E2 ∙ Episode #1.2

Upon arriving in space, Ryong panics when Eve threatens to ruin his secret mission. Soon after, a crisis forces Ryong to try something completely new

S1.E3 ∙ Episode #1.3

Determined to carry out the secret mission himself. Ryong tries to circumvent Kang Kang-su. During a space walk, Eve experiences a sudden problem.

S1.E4 ∙ Episode #1.4

With Eve's life in jeopardy, Ryong watches helplessly - as protocol prevents him from saving her. With every passing second, she loses precious oxygen.

S1.E5 ∙ Episode #1.5

Following Ryong's sudden confession, Eve discovers a hurtful truth unfolding back on Earth. Soon, she learns of an even more disturbing reality in space.

S1.E6 ∙ Episode #1.6

Eve discovers an unethical secret, forcing her to act decisively despite Ryong's objection - which drives him to take matters into his own hands.

S1.E7 ∙ Episode #1.7

After Ryong learns the results of his experiment, a potential calamity approaches the crew - threatening his safety and the survival of his work.

S1.E8 ∙ Episode #1.8

Eve risks everything to heroically rescue Ryong, facing treacherous danger. However, returning home seems increasingly improbable.

S1.E9 ∙ Episode #1.9

With Ryong and Eve stranded in space, those on Earth scramble to save them - albeit for different reason. Park Dong-a steps forward to take the risk.

S1.E10 ∙ Episode #1.10

Despite their promises in space, Ryong and Eve return to earthly realities - facing duty, recovery, suspicions, confessions and lingering longing.

S1.E11 ∙ Episode #1.11

While Ryong and Eve adjust to normal life, Chief Kang requests a detailed report of their time in space - leading them to agonize over their story.

S1.E12 ∙ Episode #1.12

Choi Go-eun confronts Eve after encountering her at Ryong's place. Chief Kang advises Eve not to see Ryong again - despite Eve's true desires.

S1.E13 ∙ Episode #1.13

Chief Kang summons Ryong and Kang Kang-su regarding their forbidden experiment in space. Eve uncovers a painful truth about her past.

S1.E14 ∙ Episode #1.14

A deployed investigative team discovers Ryong's cell phone in space - sparking an inquiry into who is responsible for the unauthorized events

S1.E15 ∙ Episode #1.15

S1.E16 ∙ Episode #1.16

As Eve's new state prevents her from coming back to Earth, Ryong commits to joining her in space. Once there, they debate a risky return to Earth.