Retired extreme athlete Yue Li transformed into a special physical fitness coach for a certain army unit. Because of her novel concept of "training special forces with parkour", she had a "mutual conflict" with the serious and old-fashioned captain of the special forces team Zhang Heng. From the "rules confrontation" on the training ground to the tacit cooperation in the mission, the two gradually discovered each other's softness in the chaotic daily life - she taught him that "tight strings need to be loosened," and he taught her that "the wind of freedom must have a direction," and finally ran in both directions under the military flag. The highlight is the contrasting collision of "hard-core military + soft and cute pets", using humorous details to deconstruct the stereotyped military camp image and show the vivid face of contemporary soldiers.