喬伊是一位製糖系統的研究及行政人員，當她遇見了擁有多家連鎖糖果店的老闆娘：摩莉，兩人從原本的對立，轉變成如閃電般似的戀人關係。不過，雙方的家人個個都有怪里怪氣的性格，連同他們的舊情人，都形成了這段戀情中的阻礙。喬伊和摩莉究竟得如何排除萬難，才能維持彼此的幸福呢？

They Came Together relates the epic love story of Joel, a corporate executive for Candy Systems and Research, a mega candy store chain, and Molly, the owner of a small sweet shop called Upper Sweet Side. When Joel is tasked with shutting down Molly’s mom-and-pop operation, the unlikely lovers find themselves hurtled into a whirlwind romance. From quaint bookstores and coffee shops to neurotic family members and psychotic ex-lovers, Joel and Molly must face some harrowing obstacles on their path to true love.