An adventure series based around helping animals big and small, fully endorsed by the RSPCA. Cassie and her friend Sarah are loo king after Sarah's cat Ruby when her parents go away for a few days. Unfortunately, when they turn up to feed Ruby, she's unwell.Rushing her to the vet, Dr Joe tells them she is very sick. With Ben and Florence in tow, the hunt is on to find out what has caused Ruby's illness before it's too late.