In a whimsical world where emotions manifest as tangible entities, you play as Mercer, a nervous but determined Heart-Mender. One day, all the hearts from the citizens of your town mysteriously go missing, causing chaos and emptiness in their lives. As you travel through fantastical landscapes shaped by different emotional states, interact with quirky characters, solve puzzles based on their emotional needs, and mend the broken hearts to restore balance. Each choice you make will either strengthen or weaken the emotional bonds between characters, leading to multiple endings based on how you've navigated their feelings.