Julia has followed her mum and dad to live on a remote island for the summer - her dad, for work; her mother, on a determined mission to find the elusive Greenland shark. But when her mother's obsession threatens to submerge them all, Julia finds herself on an adventure with dark depths and a lighthouse full of hope... A beautiful, lyrical, uplifting story about a mother, a daughter, and love - with timely themes of the importance of science and the environment. 10+