The episode begins with Yor, the "Thorn Princess," and her team keeping watch aboard the luxury cruise ship. Their mission is to protect Olka Gretcher and her son, who are seeking asylum. The team discusses potential threats and the importance of remaining vigilant, especially given the presence of unknown enemies onboard.

Meanwhile, Yor's husband Loid and their adoptive daughter Anya are also on the ship, unaware of Yor's mission. They experience a typical family evening, with Anya expressing her wishes and Loid trying to maintain a sense of normalcy.

The tension rises as Yor and her team realize that several assassins are aboard the ship. Hired by Leonardo Hapoon, these assassins are targeting Olka and her son. Yor's team plans to stay discreet to avoid drawing attention while protecting their charges.

The assassins, aware that their targets are under protection, decide to collaborate and share information to increase their chances of success. Since many influential figures are onboard, they also aim to avoid unnecessary chaos.

Yor and her team, along with Olka and her son, disguise themselves to blend in among the guests at a masquerade ball taking place on the ship. Their goal is to lose the assassins in the crowd and reach a safe location.

Meanwhile, Loid faces a parenting challenge when Anya insists on buying a souvenir. His decision-making process is humorously calculated, reflecting both his spy instincts and his role as a father.

The episode culminates in a series of near-misses and encounters between Yor, the assassins, and her family.