Three guy friends in a retirement community are the top dogs until they’re blown out of the water by the newest member of the community, a female rebel who’s ready to challenge their place – it’s high school with 70 somethings.

Chuck has a rare illness and is going to die. He and his girlfriend Delphine decide to take full advantage of the time they have left by doing absolutely everything they want.

Jaakko, a mushroom entrepreneur, finds out too late that he has been fatally slow-poisoned by persons unknown. He sets out to find the culprits before he dies.

'Our D-Day' is a work that tells the story of the last journey of a man and his friends who established the D-day of their lives. Actor Son Min-ho, Shin Bo-ra of the girl group Gugudan, and actors Jung Jun-hwan and Yoon Ha-bin, and director Baek Min-hee, who has directed several web dramas, appear.

The youthful journey in 'Our D-Day' will comfort and encourage viewers of the MZ generation and provide self-healing.