Summertime is finally here, and Matthew is excited to spend a week at his grandparent's cottage. But even though he has taken swimming lessons at his local pool, Matthew is still petrified of jumping off the dock into the deep, dark lake. Everyday Grandpoobee offers him swimming strategies while Nanabana takes him on nightly walks into the forest in search of a rare green charm that will bring him luck. Does Matthew find the courage he needs? Does Grandpoobee's coaching help? Or does he find a lucky charm? Or maybe Matthew just made a leap of faith and courage