As The Queen started walking her way to the room to sleep, a giant wave splashed up on to the ship and knocked the Queen overboard. The King immediately ran to the side and scanned the water for his Queen. Finally, he saw her and went to jump over, another wave splashed against the ship and the King bumped him head against the railing and went falling into the treacherous water.
The crew don't notice the Queen or the King fall in the water. They started to get in spare boats and the ship was drowning in all the water that surrounds it.
As the spare boats make it back to ErinDale Elsa and Anna discovers their parents is missing. They made a little funeral get together for their parents no where to be found.