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Lilya lives in a lighthouse, she is the guardian of the aurora borealis. Her dad is often away from home because he explores the ocean. From his travels, he always brings Lily a shell - she has a lot of them in her collection. One day, her dad tells Lily about a lonely whale. Other whales cannot hear his song, so he is doomed to swim alone.

Leaving the lighthouse alone again, Lily suddenly hears singing coming from one of the shells. Is it really a whale? Maybe it is singing for Lily?