Meghan McCarthy is out for a good time in Manhattan when fate leads her to meet Roc, a charismatic accountant who immediately captures her attention. As the two part ways with a promise to meet again, the young Catholic women of Irish decent has no idea that Roc is harboring a secret that will change everything. An unplanned pregnancy has pulled Roc into the dark depths of a mafia family. After he impregnates the Godfather's daughter, his only choice is to marry her or end up in the landfill. Meghan, who is clueless of his marital status, is seemingly the solution to his unhappiness. Despite an undeniable chemistry, major problems eventually cause a decades-long separation. The Source shares a tale of forbidden love between a married man and an woman that leads them to discover that even well-intended actions can have dire consequences.