On a mission as Thorn Princess and using her job as city hall as a cover, Yor is tasked with protecting the only survivors of the Gretcher family, Olka and her son, and helping them escape to a different country by traveling on a cruise ship.

After boarding the cruise ship, Yor began her duty as bodyguard to Olka and her son. Meanwhile, Yor's superior, Matthew, finds an assassin who is after Olka and her son.

Loid tries to pick out souvenirs that will make him look like a fun and happy dad so he can cheer Anya up. Meanwhile, Yor was facing off with Sickle-and-Chain Barnaby.

The deck is filled with passengers enjoying the fireworks show. Anya and Loid were also enjoying the fireworks. Meanwhile, Yor's mission finally reaches its climax. She tries to help Olka and the others escape, but they are surrounded by assassins!

Due to the movements the State Security Service members were making, Loid finds out that there was a bomb on the ship. Loid leaves Anya at the daycare in a hurry then disguises himself as a State Security Service member to take care of the bomb.