The Kiss plot
"Don't do it with your eyes closed."
When the sisters Felice and Hilary were children, they were separated to both live with other people. Felice lived with a relative with an unusual bloodline who was passed on to Felice through a kiss. Now, years later, Felice is a successful woman, and Hilary is happily married to Jack, and has a daughter, Amy. Then Felice calls Hilary to say she wants to transfer her bloodline to another family member. When Hilary dies after the phone call, Felice joins Hilary's family to try to pass her bloodline on to daughter Amy...