Rud raids the treacherous labyrinths, uninterested in fabled riches but desperate to cure his sick sister. Kicked out by a conceited hero, Rud heads home empty-handed until he rescues a girl who exposes his unparalleled protection.

Rud doesn't raid labyrinths as a shield with the Hero's Party for the riches, but to cure his ill sister. Legend has it there lies a treasure within the labyrinths that grants wishes, but before Rud can find it, the arrogant hero kicks him out. With nowhere to go, he's forced to return home, but not before saving a young girl who reveals his true power-the highest defense stat in history.—Crunchyroll

Rud, the tank with a record-breaking [9999] defense value, serves as the valiant team's shield as it sets out to conquer the maze. This is an expedition to uncover the famous secret treasure that may grant any wish and cure Manicia's ailment. Rud, however, was kicked off the team due to the hero's hubris. The explanation is that "Rud's skills are of no use at all." On the journey back home, the girl he saved revealed skills that even he was unaware of. That is a highly powerful ability. The adventure story of the strongest tank Rud begins under the safety of [Highest Defense Value 9999] and [Unique Skills].—Bilibili TV