What do rats, fleas, and mysterious black lumps have to do with one of the deadliest events in human history? This gripping nonfiction book for kids ages 7–12 explores the story of the plague that swept across Europe in the 1300s, changing families, towns, and entire countries forever. Told in a friendly, honest, and age-appropriate voice, this book brings the past to life with true stories of people who lived through terrifying times—kids who lost loved ones, doctors who tried strange and sometimes dangerous cures, and brave helpers who risked everything to care for the sick. Along the way, readers will learn how the disease spread, why some cities survived better than others, and how the world slowly began to recover. This is more than a history of illness—it's a story about human strength, change, and kindness. It also connects the past to the present, showing how scientists today study ancient plagues to help keep people safe now. Perfect for curious kids who love history, science, and real-life adventure, this book answers big questions with heart, honesty, and hope. It helps young readers understand how even in dark times, people worked together, helped each other, and found ways to move forward.