South Korean prosecutors unveiled full charges against trade union leaders accused of spying for North Korea on Thursday, describing a “movie-like” scheme that allegedly featured secretive meetings with DPRK operatives abroad and encrypted communications in YouTube comments sections.

The Suwon District Prosecutors Office said four members of the Korean Confederation of Trade Unions (KCTU) were indicted on Wednesday on charges of espionage, communicating and meeting with North Korean spies and other violations of the National Security Act.

“Former and current key executives of the KCTU infiltrated the [union] to establish an underground organization, spy with North Korean agents and carry