A resident of foreign intelligence, nicknamed 'badger', receives a new task through a sent messenger. Badger's subordinates Sen-ryur Pak, a doctor, and his wife Chon-ok Lee take action. They are participants in a new sabotage operation.

Based on the story of the same name by Han Sorya, which tells one of the pages of the life of South Korean youth - her struggle against external interference and for the unification of the peoples of South and North Korea.