Sherina Darmawan is an energetic and intelligent girl living in Jakarta with her parents, until they have to leave when her father gets a job as an
agronomist at a plantation in
Lembang owned by Ardiwilaga. She quickly adapts and acquires some new friends, only to find herself as the target of the bully boys, including a boy named Sadam. Sherina cannot accept such treatment and gathers her classmates in a struggle against Sadam. When she accompanies his father to visit the plantation, she discovers that Sadam is Ardiwilaga's son. Sherina and Sadam challenge each other to climb the nearby hills and, upon arriving, Sadam attempts to leave Sherina behind. She tries to find her way back to the plantation and stumbles across an adult man. After convincing her that he has found Sadam, they go to a car where another man is waiting. As they gesture for Sherina to get into their car, Sherina hears Sadam's muffled voice from its
boot, telling her to get away. She discovers that they have been tasked with kidnapping Sadam by a cunning businessman named Kertarajasa, who plans to buy the plantation to complete their development project. When the kidnappers try to call Ardiwilaga, they reach his wife and tell her to prepare a 3 billion
rupiah ransom. She agrees to this condition and convinces her husband to sell the land to Natasya, who had offered them 2 billion the day before. Later, at the kidnappers' hideout, Sherina rescues Sadam while the guards are sleeping. They take documentation connecting the thugs to Kertarajasa and escape to spend a night at a nearby
observatory. In Jakarta, Kertarajasa dances with his wife, revealed to be Natasya, stating that he will launch his project the following day once the plantation is legally his. As Sadam is desperately ill in the morning, Sherina tries to leave the observatory through the front door, only to discover that it had been locked. With Sadam's help, she
rappels down the observatory wall and outruns two of the kidnappers, making her way to a nearby village and catching a ride to Ardiwilaga's home. Once Sadam is captured, Sherina arrives just as he is preparing to sign the land deed over to Natasya and reveals Kertarajasa's plans. Police quickly arrest Natasya and Kertarajasa, and when the kidnappers try to collect their ransom, they are arrested too. When Sherina and Sadam return to school after holidays, the latter agrees to stop bullying his classmates. ==Cast==