When Mi-so and Ha-eun first meet in childhood, their lives become instantly intertwined, forming a bond surrounded by happiness and naivety. But as adulthood arrives, alone and together, they are forced to deal with sadness, anger, grief, growth, and most of all, love.

In 2029, Korea's lunar probe Woori embarks on a historic journey to the moon, capturing global attention.

When the investigation of 'Koreagate' takes place, Park Yong-gak, a former KCIA director who knows everything about the government's operations, heads to the United States in exile.

Min-ho's adulterous lover Se-hee is murdered in a hotel where only the two of them were present, and Min-ho is immediately singles out as the prime suspect. Insisting on his innocence, Min-ho hires the talented lawyer Shin-ae to defend him, and confesses to her that a car accident on the day before may be connected to Se-hee's murder.

The massive scandal comes to light through a father's unwavering search for the truth behind the sudden death of his family.

Two ex-lovers navigate their lives post-breakup — struggling to redefine their relationship, from partners to strangers and everything in between.

When his mother goes missing, Lee Ho-yeon sets out to search for her. In the course of that journey, he discovers his parents' pasts during the democracy protests of the 1980s when student activists rose up against the repressive Chun Doo-hwan regime. Reading a book written by his mother, Ho-yeon uncovers a story of hope, love and betrayal, and struggles to understand painful secrets that have been hidden away for thirty years.