Ep 25. Hana Mao 'ole ka ua o Waianae (Endlessly Pours the Rain of Waianae)

Danny's brother is caught up in a case involving a stolen car and a dead body, and he pleads with Danny to help him out. Meanwhile, McGarrett and the team investigate the death of a young woman who was apparently drowned in her own bed. They soon realize that there is more to the case than meets the eye when they discover that the woman was the daughter of a wealthy businessman who had been involved in a bitter legal battle with a rival company. As they continue to dig deeper, they uncover a web of corruption and deceit that goes all the way to the top, and they realize that they will need all their skills and resources if they are to bring the guilty parties to justice. Along the way, they must also deal with personal issues and conflicts, as Danny struggles to reconcile his love for his brother with his duty as a cop, while McGarrett deals with the aftermath of his recent split from his girlfriend. In the end, they are able to bring the guilty parties to justice, but not without a heavy toll on their own lives and relationships.