A mad scientist grandfather invents a genetic transformation machine and his 4 year old grandson accidentally turns his body into that of a 30 year old man. Baby Bobby escapes and runs around town as his siblings try to catch him before their parents get back from vacation AND before the bad guys get to him first. The machine is worth a lot of money and they only have a day before the machine loses its capabilities to change baby bobby back.NBA人气评论员王猛从专业的角度抒发了对于动画的观念，对动画主角团之一的司马沉宽进行了肯定：我真的很喜好沉宽打球时的节拍，它的节拍感让我想到欧文；此外，王猛也肯定了《左手上篮》在内容和前言模式上的立异，他表示，如今年青人看篮球的途径变了，不再局限于电视直播，以是适当更新篮球内容是需要的。