Mariam is one of millions of people from all over the world who has come to Makkah for the annual pilgrimage of Hajj, and she overflows with excitement and awe. Mama tells her, "Hajj is a time to do good, share, and be thankful." But what good can Mariam do? That's it! She'll share Zamzam, blessed water from an ancient well, with everyone she meets. As Mariam shares her Zamzam throughout Hajj, she meets friends from all over the world. From fellow pilgrims, she learns new ways to say thank you, tries new foods and drinks, and discovers that when you share with and help others, someone will help you when you need it too.