The full trailer for the upcoming musical-romance "One Step" has been released. In it, Sandara Park plays Si-Hyun, a woman who lost all her memories, while Han Jae-Suk transforms into a songwriter, Woo-Hyuk, who lost his glorious past.

On Feb. 20, Open Trade dropped the film's first full-length trailer on YouTube, offering a closer look at Park and Han's respective character. After being involved in a car accident, Si Hyun lost her memories and only hears sounds in colors.

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One day, Woo Hyuk hears Si Hyun hums a strange melody in her sleep. The former writes it down as a score and gives it to her, hoping that it would help her remember something. Along with Ji Won (Hong Ah Reum) and Jee-Il (Cho Dong-In), they embark on a healing journey as they attempt to complete the song that the heroine hears in her dream.

Directed by Juhn Jai-Hong, "One Step" will be released in theaters across South Korea sometime in April, according to Korean newsoutlet Sports DongA. More details about the project will be revealed soon.

Park, who debuted as a member of 2NE1, is one of the main hosts of OnStyle's "Get It Beauty 2017." There, the 32-year-old idol gives fans full access to her beauty secrets, especially in maintaining a young-looking skin. She suggested the use of supplements such as vitamins and collagen that help boost cellular function and eventually give a more youthful-looking glow.

"I felt some pressure because the show is about information on makeup, but I had fun shooting it," Park said through a press statement released by YG Entertainment, as cited by The Korea Herald. "The show will appeal to a lot of viewers since it focuses on the viewpoint of those who are inexperienced with makeup."

For now, check out Park as Si-Hyun in the official "One Step" trailer below: