Monica is an aid to Dr. Sandra Pena, a Portland heart surgeon. Sandra's favorite patient, Ilena, is in need of a heart transplant and time is running out to find a compatible donor. Meanwhile, at a hospital in Boise, Angela, the victim of a horse riding accident, lays dying. Sandra is excited to learn that Angela may be the compatible donor Ilena desperately needs. Tess, an organ donor specialist, tries to convince Angela's husband Dan to donate Angela's heart. Unwilling to believe that his wife is dying, he refuses to agree to the transplant. In an attempt to life Ilena's spirits Monica introduces her to Sandra's daughter, Casey. The two teenagers quickly become attached. When Sandra learns that the heart is unavailable, she warns Casey of Ilena's fate, and insists she not see Ilena anymore. Rather than give up hope, Casey takes a bus to Boise, without Sandra's permission, in hopes of convincing Dan to donate Angela's heart. In Boise Casey meets Andrew, who has been sitting