Ep 20. The Song in Your Heart

Emma and Hook's wedding day arrives, and the residents of Storybrooke prepare for the ceremony. As they get ready, they start spontaneously breaking into song and dance, with each character singing about their dreams, hopes, and fears. The enchanted song seems to have come from the Evil Queen, who's plotting to destroy their happiness once and for all.

Meanwhile, in past Enchanted Forest, Snow White and Prince Charming are expecting their first child, but the Evil Queen threatens to curse the whole realm unless Snow gives up her child. To protect the baby, the Blue Fairy casts a magical spell, making a song the only weapon powerful enough to defeat the Evil Queen. As a result, everyone in the kingdom gets a song embedded in their hearts, giving them the power to fight against the curse.

As Emma prepares for her big day, she discovers that the song in her heart is missing. But instead of panicking, Emma decides to look for answers and seeks out the Blue Fairy. With her help, Emma learns that the song is buried deep in her subconscious, and only True Love's Kiss can unlock it.

As the wedding ceremony begins, the Evil Queen crashes the scene, but thanks to everyone's singing and dancing, they're able to defeat her. Finally, Hook and Emma share their True Love's Kiss, breaking the curse and releasing the song in Emma's heart. She sings a beautiful ballad, revealing her true feelings for Hook and sealing their love forever.

In the end, the residents of Storybrooke celebrate the couple's happiness with a big song and dance number, releasing all their worries and fears. The episode ends with everyone living happily ever after, but perhaps hinting at more adventures to come.