Johnny Kapahala, a teen snowboarding champion from Vermont, returns to Oahu, Hawaii, for the wedding of his hero -- his grandfather, local surf legend Johnny Tsunami -- and to catch a few famous Kauai waves. When Johnny arrives, he meets his new family including "Uncle Chris" (the 12-year-old son of his new step-grandmother) who resents the upcoming marriage. Chris's only interest is to join a mountain boarding crew led by a teenage bully. When Johnny's grandfather and his new wife open a surf shop that also caters to mountain boarders, they are soon embroiled in a turf war with a rival shop owner who wants to shut their business down.
Brandon Baker
as Johnny Kapahaala
Cary-Hiroyuki Tagawa
as Grandpa Johnny Tsunami
Jake T. Austin
as Chris
Robyn Lively
as Carla
Mary Page Keller
as Melanie
Yuji Okumoto
as Pete
Rose McIver
as Valerie
Jonathan McDaniel
as Sam Sterling
Andrew James Allen
as Jared
Phil Brown
as Troy
Akoni Kama
as Self
Thomas Newman
as Bo
