Tully Caswell is already engaged to Janet, but he falls in love with the sexy strawberry-blonde Lisa during the summer when she is home from college. She returns to school, and Tully, thinking the affair is over, goes ahead and marries Janet. Janet soon becomes pregnant and denies him further sex, driving him into the arms of another woman, who also becomes pregnant. Lisa returns for the winter holidays, and Tully, who has realized he is very much in love with her, resumes their affair. Lisa leaves again but returns at the spring break, bringing a male friend, who makes Tully jealous. The friend stays, but Lisa departs once again, believing Tully to have his hands full with his other women and unsure of what will happen after the babies are born. After Janet gives birth to baby daughter Sunshine, she and Tully fight, and Tully takes the baby away and files for divorce. After the tragic loss of his baby son Shane's mother, Tully finds himself with two babies to care for and missing Lisa. So he is delighted when she returns.