Old man Ma was an early Nascent Soul stage cultivator from Righteous Dao Alliance's Overwhelming Pavilion.
After plan of actions towards Moulan invasion was settled, Old man Ma, Spirit Controlling Sect Elder Gu Shuangpu and Han Li led a party of eight Core Formation cultivators to the strategic location at the border of the State of Yu as support to Nine Nations Union's forces. They joined Senior Lu, Clear Void Sect's Chong Xuzi, Yellow Maple Valley's Murong Brothers and the Saber Transformation Dock's Li Yingzhu, who were a garrison there.
Old man Ma and the Murong Brothers went to receive the defeated Nine Nation cultivators and fought Moulan spell warriors. Soon after, Bu Yunhe retreating from Sky Terrace Valley joined them. Then Moulan spell warriors appeared. They decided one on one duel. Old man Ma fought Great Sage Ku Yao of Fire Rite Tribe. With Supreme Eight Trigram Diagram he was able to come to a draw against Ku Yao and his Fire Spirit Flood Dragon. As black-robed Heavenweep wanted to fight next, Han Li faced him. Using Divine Devilbane Lightning black demon Nascent was killed. Rest of the Moulan troops retreated. This was suprising for Senior Lu and others.
Afterwards, Gu Shuangpu visited Senior Lu. He wanted to convince him that Han Li was a spy for Moulan. When Senior Lu was handed a jade slip, it transformed into the Twintailed Jade Serpent, which killed him with its poison.  Then, it turned out this was just a flesh puppet and Daoist Gu was caught in a barrier. He admitted to Senior Lu, Han Li and Old man Ma that he was originally from the Moulan tribes. Han Li accidentally eavesdropped him during fight before. He agonized how he lived concealed in the Heavenly South for so long, yet he fell to such a careless mistake. When he was to be executed on spot, Gu Shuangpu used Spiritfuse Technique to fuse with his Twintailed Jade Serpent. He turned into half-man, half-demon serpent monster and its power increased to a mid Nascent Soul stage. As it broke the barrier, Han Li turned it into an ice sculpture with Celestial Ice Flames. Senior Lu and Old man Ma were even more astounded than when Han Li killed black-robed cultivator. Then Senior Lu was making preparations for next fight against Moulans.
During next attack, 300 Moulan spell warriors were killed in a formation through a trap. Sage Ku Yao led next attack. Old man Ma fought an early Nascent Soul stage Sage Wen. And Senior Lu, together with his Four-Eared Golden Ape artifact spirit, faced Sage Ku Yao. When Sage Le wanted to destroy formation, she encountered Han Li. While they fought, Divine Sage Zhong arrived and killed Senior Lu. Old man Ma lost an arm. Sage Le was relieved. As Han Li was chased by the Divine Sage, Old man Ma was hunted down by Sage Le. He managed to escape wit his Nascent Soul, after sacrificing his body.