Half a Heart is a deeply emotional and tender contemporary love story centered on two teenagers, Tessa and Caleb, both living with severe congenital heart conditions. While Tessa clings to rigid routines and caution, Caleb embraces risk and spontaneity. Their contrasting philosophies collide—and ultimately intertwine—in a journey that explores resilience, mortality, and the courage to love despite ticking clocks and fragile bodies.