大狗史派克趾高气扬在院子里散步,结果不慎踩到了一枚钉子。他疼得嗷嗷大叫,痛苦哀号,甚至在小老鼠杰瑞为他拔掉钉子后还兀自沉浸在虚妄的痛苦之中。事后,史派克十分感激杰瑞的仗义,于是送给他一只铃铛,承诺杰瑞遇到困难时只要摇动铃铛史派克就会飞奔前来营救。刚刚告别史派克,杰瑞便遭到老猫汤姆的袭击,当然铃铛拯救了杰瑞,汤姆遭到大狗的一顿胖揍。 三番五次失败的捕捉之后,汤姆彻底臣服于杰瑞,违心送上香甜可口的奶酪。正当绝望之时,却发现社会正号召主人们将家犬拴起来。对汤姆来说,这无疑是报复杰瑞的绝好机会…… Jerry removes a tack from Spike's paw. In gratitude, Spike gives Jerry a bell to ring when he's in trouble. Soon, Tom is acting as Jerry's servant. But then the city passes a leash law, and Spike can no longer help. Soon, Tom is taunting Spike (much like Foghorn Leghorn taunts the barnyard dog) and harassing Jerry, who becomes his servant until the leash law is repealed.