Together with a Belgian research team, Kushlani Dissanayake, a young Sri Lankan scientist and mother, goes on an expedition in the waters around Sri Lanka in order to collect crucial information to protect these coral reefs from perishing. Gathering DNA-samples of corals, she tries to uncover the distribution patterns of the coral populations and their larvae. Through the professional endeavour and personal story of Kushlani, we discover the deep waters around Sri Lanka, as well as her view on motherhood, human kind and a theory on ‘the survival of the kindest’.