TOur world and this other world, called Ambrosia, collided a little over a decade ago when a man from Ambrosia was sent to Earth for official business but he met and fell in love with a woman from earth and they had a child together. Eventually, the man thought the woman and his daughter would be better off without him and he went back to his world. The daugher's name is Sadie. Since Sadie has blood from both worlds, she needs the healing water to survive so Rayne is sent to earth from Ambrosia to look after Sadie. Rayne is supposed to not let Sadie know who he is, or how special she is, or that she needs the healing water to survive. However, their feelings for each other grow and Rayne tells Sadie the truth. There are also some bad guys in the book to keep things interesting. Actually, the book is interesting. The characters are well developed and draw you in.