In a surreal, fast-paced world where hearts are not just organs but sources of power, players assume the role of Harriett, a quirky heart surgeon who can communicate with her patients’ hearts. After a freak accident in the operating room sends her consciousness into a limbo of heartbeats, Harriett must navigate a series of dramatic and comedic scenarios to piece together whose heart belongs to whom. Each heart sings a different song of its previous owner’s life, and players must solve emotional puzzles, build relationships, and make life-altering choices to return to her own body. Along the way, she faces off against rival surgeons, the hospital's cranky AI, and even vengeful spirits haunting the hearts she's touched.