Their savior (Klaus, Kol, Finn and Elijah mikaelson)

Harper is a beautiful, smart, happy, outgoing person. She loves being around her family and friends. But she has a secret.
Since she was a child she has been in and out of the hospital. She has a sickness that doesn't seem to go away. The doctors move her California to get better treatment.
Now at the age of 23 Harper moves back to Mystic Falls to live with her cousin, Elena and Jeremy Gilbert. Harper's health is still not the best and there is no cure for it. Harper knows she can die at any moment, so she lives life to the fullest. Except for one thing. Love. She has sworn not to love so the man she loves will not have to suffer after her death. But what happens when she goes to the Mikealson's ball and meets the Mikealson brothers? What happens when she is their mate?