Finn好喜歡奶奶，更喜歡和妹妹一起去奶奶家度假。但是這次Finn太興奮了，一不小心玩過頭，眼睜睜看著彈力球撞壞了奶奶的漂亮時鐘。在嚇到和緊張之下的Finn，開口說出第一個小謊話「這是妹妹弄壞的！我只是在幫忙修理！」
小謊話就像一顆顆彈力球似的彈出來，從第一個桃紅色的，接著第二顆藍色、第三顆綠色……漸漸的Finn被十幾顆空氣彈力球緊緊包圍了，突然覺得什麼都變得不好玩、不好吃了，快樂的度假為什麼突然會變成這樣呢？慶幸的是Finn最後靠神奇的能力找到了解決辦法，而且最有趣的是這個神奇的能力每個人都擁有。
Finn has always loved going to stay with his grandma . . . until one day, he tells a little fib that gets out of control! A book about telling the truth, from the bestselling author of the Big Bright Feelings series.
Be open, be honest, be you! Big Bright Feelings for little people.
When Finn accidentally breaks his grandma's precious clock, he tells a teeny tiny little lie - and blames it on his sister instead! Soon, Finn's little fib is OUT OF CONTROL, and it's getting in the way of everything! Can he find a way to tell the truth?
