Nell and Nate Kidd, visiting Monterey with their mother, a well-known ecologist, team up with the local sheriff to find out who is killing the sea otters that live along the California coast.
Sea Otter Pup spends the first months of his life with his mother in a protected cove off the California coast, learning how to hunt for food and care for himself, before venturing out into the dangers of the Pacific Ocean.