Charlie sleeps with Kandi's mother, as Alan tries to win her daughter back; Kandi arranges a date between her father and Judith.
When the CEO of a successful surf company is murdered, Kono revisits her past; Five-0 is thrown into the varied but interconnected worlds of North Shore surfing.
Warm hearts, cold feet: Seth and Summer each look for a way to call off the wedding. Who will crack first?
Seth is clueless about what to do for New Year's Eve. Solution? Crash the Ryan-Taylor road trip to Vegas. Now add pregnancy tests, a space alien rave, thefts, misunderstandings, pursuits and a marriage proposal and it's time to welcome the new year!
Six months after Mother Nature grabbed everyone by the neck and shook, events return to normal, but complacency is never the Cohen or Cooper way. Time to follow the head and heart to what's right.