Yoon Jaemin was an unawakened Gate porter until his employer abandoned him inside a collapsing Gate.

On the brink of death, he finds a mysterious pendant and awakens a unique ability that lets him track down missing people.

The first person he finds is Baek Seorin, South Korea’s legendary Sword Saint and youngest S-rank hunter, who disappeared seven years ago and was presumed dead.

After escaping the Gate together, Jaemin receives a fragment of Seorin’s ability and tries to return to his quiet, low-profile life.

Unfortunately, Seorin has other plans.

After reappearing in the world, she tears apart the corrupt foundation built around her disappearance and refuses to let the person who saved her out of her sight.

Then Jaemin discovers another lost item, one belonging to Han Doa, an A-rank healer who has been missing for five years.

Following its trail leads Jaemin and Seorin into a sealed Gate, where they find Doa trapped among deadly trials and doppelgängers.

Jaemin only wanted to rescue the missing and live quietly.

Somehow, the people he saves keep finding reasons to stay by his side.