Warning: This post contains spoilers for The Woman in Cabin 10 . On her first night on board the Aurora Borealis, a luxury superyacht embarking on a weeklong maiden voyage across the North Sea, journalist Laura "Lo" Blacklock ( Keira Knightley ) witnesses the aftermath of a passenger being thrown overboard from the balcony of the cabin next to hers. But when she's told all the guests and crew have been accounted for after reporting the incident, she begins to realize someone on the ship is