Twelve-year-old Suzy Swanson wades through her intense grief over the loss of her best friend by investigating the rare jellyfish she is convinced was responsible for her friend's death.

When a sardine who's scared of everything loses its handbook for staying safe in the sea, it goes into total panic mode. But right as big, scary shadows are surrounding it, the sardine runs into a jellyfish preaching the wisdom of wiggling your worries away. Try it! Wiggle up...wiggle down ...wiggle all around! When you're done, your problems might not seem so enormous—and those scary shadows might turn out to be friends!

A happy-go-lucky, waffle-loving narwhal and a cynical, no-nonsense jellyfish forge an unlikely friendship and share adventures while exploring the ocean together.