BTS is returning to where it all began, not out of nostalgia, but to find its footing for the road ahead.

The upcoming feature-length Netflix documentary film " BTS: The Return" follows the group as it reunites after a long hiatus and is about to release its fifth studio album, casting the comeback as both a return to its roots and a push into a new chapter. The film will be released on March 27, according to Netflix on Monday.

The film follows the seven members as they look back on the years behind them and begin shaping the next chapter of their career, cutting between footage from the group’s previous world tour, members’ military discharges, songwriting sessions in Los Angeles and scenes from recording, filming and idea meetings.

The trailer reinforces the idea at the heart of the comeback: For BTS, returning is not about staying where it started, but about finding the ground from which to move forward.

Set to the traditional Korean folk song "Arirang," the trailer carries a restrained emotional weight.

“We are finally back where we’re meant to be,” said Jimin.

“And this might be something only we can pull off," said RM.

That sense of return is matched by an insistence on change. “Trends shift every season," said Jimin. "Standing still isn’t an option."

Just as firmly, the group reasserts its sense of origin.

“At our core, we’re still a bunch of country boys from Korea,” said RM.

BTS will release “Arirang,” its fifth full-length album, at 1 p.m. on Friday. The 14-track album, overseen by HYBE Chair Bang Si-hyuk, is billed as a portrait of “BTS as it is now.”

Credits released on the group’s social media show the band collaborating with established pop producers such as Diplo and Ryan Tedder, as well as artists from more independent corners of music, including rapper Jpegmafia and psychedelic rock musician Tame Impala.

The group will hold the “BTS The Comeback Live” performance at Gwanghwamun Square on Saturday. The show will be livestreamed globally on Netflix.

BY KIM MIN-YOUNG [kim.minyoung5@joongang.co.kr]