A tidal wave is about to hit the Grand Waimea as Alexandra Hudson arrives to reveal the shocking secret that she is the illegitimate daughter of hotel magnate Walter Booth and therefore is Nicole's half-sister. Alexandra is armed with a hidden agenda and ready to take advantage of all that the island and the hotel have to offer. Meanwhile, Walter continues to threaten Vincent's ownership of the hotel and enlists Tessa's help to take over the Grand Waimea. Elsewhere MJ and Chris temporarily move in together and Gabriel continues to date both Charlie and Erika.