In a distant city, there is a mystery greater than a field of daisies or a cloudless sky. It's the mystery of Lucas's smile, which appears on his face day and night, in summer and winter, 365 days a year. Well, 366 on leap years. Scientists from all over the world come to study the phenomenon without success. Not even Lucas can explain it. He's simply happy. But there is a time of day when his smile beams in a particular way: when he leaves the blue house, home to an old grumbling man with a growl like a bear's. The moments that Lucas shares with him and the atmosphere of happiness and warmth that is generated between the two reflects the ability of a child to touch the heart even of an old curmudgeon. A fresh story- funny and endearing, and an invitation to reflect.