Seven-year-old Hannah doesn't want to leave her home in Kentucky to move out west. Remembering something her grandfather once told her, she secretly buries her beloved tea set among a bed of irises with plans to return for it one day. "Keep my tea set safe for me" she whispers to the irises before leaving, "It is our secret!" When Hannah doesn't return, and a young girl named Katie moves into the house, the irises are faced with a dilemma. Should they reveal their secret? Guided by the wisest amongst them, with help from their animal friends, the irises fulfill their role as guardians of the secret, while helping Katie discover a special connection to Hannah.