NCIS in Hawaii receives a visit from Scotland Yard, who have to investigate extensively in Hawaii. Meanwhile, Special Agent Jane Tennant gets an unpleasant visit of her own. From Leyla Keen. Keen is looking for someone she can't find without more information. Keen threatens Tennants family to get what she wants. Agent Tennant has a very personal decision to make. Meanwhile, the team must solve a murder that is, quite literally, hair-pulling.