This book tells the story of how enemy troops poaching rare animals and illegally mining resources on Planet K, prompting a guerrilla soldier and his comrades to launch a "Defense of Planet K." They devise a plan to make the enemy's gold bars "disappear," and use food to lure electric eels, which then electrocute the enemy soldiers who were harvesting pearls, causing them to flee in disarray. The guerrilla soldier captures the enemy commander but is tricked into a weightless valley. With his ingenious tactics, he once again defeats the enemy soundly.
本书讲述：敌军在K星球偷猎珍稀动物、盗采矿藏，大头兵和战友发起“K星球保卫战”；他们用计使敌人的金条凭空“消失”，用食物引来电鳗，把正在采珍珠的敌军电得落荒而逃。大头兵俘虏了敌军司令官，却被骗进失重谷，妙招连连的大头兵，又打得敌人满地找牙。
本书讲述：敌军在K星球偷猎珍稀动物、盗采矿藏，大头兵和战友发起“K星球保卫战”；他们用计使敌人的金条凭空“消失”，用食物引来电鳗，把正在采珍珠的敌军电得落荒而逃。大头兵俘虏了敌军司令官，却被骗进失重谷，妙招连连的大头兵，又打得敌人满地找牙。
