Olivia has always been an unlucky person. But when she burns the love letters from her ex-boyfriend and accidentally sets an entire building on fire, she finds herself in a real bind. Liv has to move in with her brother, who lives with the nightmare of her childhood, his best friend Colin. Now a successful businessman, Colin is even more arrogant than before, but unfortunately, he’s also really hot. Olivia finds a distraction from her emotional chaos through the text messages of a stranger that accidentally land on her phone. The sexy messages from Mr. Wrong Number make her weak in the knees. And Mr. Wrong Number finds the witty stranger irresistible too—until he realizes that she is the little annoying sister of his roommate.