Prince on a White Horse (2012)

Marta finally meets her prince on a white horse, but the romance quickly becomes complicated when it turns out that her "Mr. Perfect" is actually a paid assassin on the run from the drug cartel that hired him, because he turned against them and is killing those who hired him. An additional complication is that an FBI agent who is trying to bring him to justice gets involved in the story, so Martin is a prince on a white horse, but in reality he is a paid assassin on a white horse who is fleeing from the law and his clients.