8-year-old Caleb shares what he has learnt about sickle cell disease because his baby cousin – one year old Willow has the disease. The love he has for Willow has also helped him learn how to babysit while always considering Willow's sickle cell. Caleb wrote this book to share how much Willow has taught him about this rare disease. He believes that very few children know about this disease and might struggle to find child-friendly material to learn about it. Reading this book will not only introduce children to the basic facts about sickle cell disease but will also give them tips on how to care for babies responsibly.