Chelsea is an Indonesian TV serial that was aired from April 12 to October 26, 2008 on SCTV.

Nayla, a 15-year-old girl who lives in a simple family, is cheerful, diligent, smart, good at basketball, and diligent in worship. One day, unusual things began to happen to Nayla. She started falling frequently and walking strangely. When her mother took her to see a doctor, Nayla was diagnosed with Spinocerebellar Ataxia, a rare disease.

Five teenagers' lives are not only filled with lectures and extracurricular activities but also their love lives. Although love is a huge part of life for these five teenagers, they realise that their friendship is the most important above all else.

The Shadow Master allys with Queen Felina, the leader of the White Tiger nation, who holds a grudge against the Lion nation.

Reina is caught in a love triangle with twin brothers, Ares and Orion. Reina's father is assigned abroad and causes a long separation between them. Problems arise when Reina realises the change in behaviour in the twins.