Lu Fan, a modern operations manager, travels back in time and becomes a poor scholar in Bianjing. With both parents deceased, he is left with a predatory loan of thirty taels. When the creditor comes demanding repayment, Lu Fan uses modern negotiation strategies to keep him at bay and secure a three-month repayment deadline. Just then, his betrothed, Xie Yunli, the head of a powerful tea-trading family, arrives to break off their engagement. She bluntly tells him he has no chance of turning his life around and even offers him a lowly bookkeeping position, which Lu Fan calmly refuses. Facing a city filled with tea shops, he draws on modern beverage business strategies and plans to create a new kind of milk tea using leftover tea, sheep's milk, and honey. Armed with business ideas far ahead of his time, he is determined to overcome everyone's prejudice, turn his miserable debt-ridden circumstances around with a single cup of tea, and carve out his own commercial empire in Bianjing.