When a DNA test reveals a profound revelation, Maddie grapples with the enormity of what she is pursuing. As she reconsiders her future, she receives surprising news from Schulman. Maddie finds solace in her love for Alex. A poignant call leads to a promise that Maddie vows to keep. Maddie arrives in Boston to accept the prestigious APA Humanitarian Award. An encounter with astrobiologist Lester Padgett leads to a seismic discovery, sending Maddie’s life into sudden uncertainty as the future of humankind hangs in the balance.