Lu Yu, an overlooked member of his family, becomes a烽火台(fire beacon tower) keeper. When his beloved is captured, he awakens a check-in system. By checking in at a battlefield of hundreds, he gains the loyalty of the Eighteen Riders of Yancloud! Checking in at a battlefield of thousands, he gains Luo Cheng's loyalty! Checking in at a battlefield of tens of thousands, he gains the loyalty of the Xuanjia Army!