Relaciones Peligrosas, originally known as Fisico o Quimica, is a Spanish-language telenovela produced by United States-based television network Telemundo Studios, Miami. It is an adaptation of the Spanish television series Física o Química. It has Sandra Echeverría, Gabriel Coronel, Maritza Bustamante, Gonzalo García Vivanco, Jonathan Freudman, Mercedes Molto, Carlos Ferro, Daniela Navarro, Renato Rossini, Kevin Aponte and Ana Layevska in the leading roles of the plot.

In the city of New York lives FIVE (Carolina War), a woman always faithful to its rules. With skill and intelligence makes unconventional theft without violence. Greed will break one of its rules and end locked in a mysterious apartment. FIVE gradually you will realize that fell into a trap and right there starts a race against time where you need to test all your skills to escape before it's too late.