Marimar is a naive young woman who lives a happy life on an island. Brought up on the island by an old couple who found her drifting by the sea, she knows nothing of her tragic past. She lives carefree until she meets Sergio Santibañez, and falls deeply in love with him. However, when Sergio learns that his father married his ex-girlfriend Angelica, Sergio decides to seduce Marimar and makes her marry him to get revenge on Angelica. But Sergio touched by the innocence of the girl and the feelings she has for him eventually fall in love with her. Angelika becomes jealous and makes life difficult for Marimar. Sergio, to protect the latter, abandons her with the hope of returning to seek her when he will earn enough money to take her away from the wicked plans of Angelika. When he finally comes back, Angelica announces him that Marimar is dead...