It's been a year since your breakup with your first love, Minjun . One day you got invited to a party where everyone gathered in a circle to play a card game. Everyone is playing a card game called Deep Conversations. When it's your turn to pull a card, you receive one that reads "'When was the last time you said "I love you," and you meant it?" Suddenly, you feels like someone sitting next to you its your first love, Minjun and he's looking at you waiting for answer.