Many whale and dolphin species congregate in the waters of the Canary Islands. Short-finned pilot whales are found here in vast numbers – the magnificent masters of deep sea diving. One large group is led by Isora, the matriarch, whose activities are documented for a year. Whilst the females and their offspring form the hard-core unit of this close-knit society, the males ensure the protection of newborns and juveniles – a long-term investment which is crucial for pod survival. As the mothers give birth we examine the close bonds between the new arrivals and the pod, and how the whales deal with the tragic death of one of the calves. It’s not just a struggle for the young, but the rest of the whales must also deal with the dangerous effect of plastic waste, not to mention their daily battles with large squid who share the same food taste.