Coral Johnson is surprised to be called away from school in the middle of a class, but what’s even more surprising is what awaits her back at home. A vulnerable young gelding named Acorn is sick once again, and this time she doesn’t think the lovable animal will survive. But he isn’t the only horse at Saddlers Ranch fighting against an unexpected bout of heavy colic… How will her family cope if they end up losing two dependable steeds at the same time? Adding to her concerns, Coral is eventually forced to confront her priorities and rediscover what truly matters most in her life when she almost loses her father due to a mishap with a bad-tempered bull. Mischievous Acorn may be prone to every disease or illness in existence, but his steadfast and determined nature more than make up for that side of things. Even so, everyone on the ranch is still asking themselves the same question – will the gelding be strong enough to overcome yet another strain against his already fragile health?