When two frenemies reunite for a royal emergency. - Prince Ni-ki of Odessia is the crown prince in line for the throne. As the land of Adira ravages through war with the enemy kingdom, Zyrkon, the rest of the world remains in danger. It isn't until the King and Queen of Odessia decide Ni-ki's fate: to go on a voyage to meet his betrothed, Princess Isabel of the Eloria Kingdom, to unite the kingdoms and set an official alliance. In preparation for his trip, Prince Ni-ki encounters a frenemy he hasn't seen in years, Hayoung Marina, Captain of the Odessia Royal Navy, set to be his bodyguard for the 4 week voyage.