When the swimming competition is coming, Wen is under lots of pressure, so it's gloomy this summer. Ann, who is inseparable beside her, found out something different. To confront Wen’s closure and trauma, Ann decides to be closer to Wen. But, when she gets closer to Wen once, it pushes them further.

Hanni and Ziyou have a crush on each other that reaches the height of its intensity. Hanni is inseparably glued to Ziyou and takes care of everything in her life, but a misunderstanding makes Ziyou want to avoid Hanni. Like a silent waltz, the two enter a speechless game. Back and forth, one takes a step forward as the other retreats. Can they ever share a brighter day?

It’s difficult making the transition from being single to starting a relationship. So how should we cope? Echo Each Other abandons spoken dialogue, instead using sign and body language to silently communicate with the audience.