Peter and Ernesto are best friends who are usually content to hang around their tree and cloud picture. Ernesto, though, decides he'd like to see a little more of the great big sky, so he sets off on an adventure -- an adventure that leads Peter to worry about him and set off after him! Both sloths have their own sorts of adventure in this delightful graphic novel, which is rife with deadpan, dry humor. Pretty delightful.