Chaska ek chhote shehar ki kahani hai jahan log normal zindagi jeete hain, par unke andar chhupi hui khwahishe chupke se palti rehti hain. Ek chhoti si attraction dheere-dheere obsession ban jaati hai, aur phir shuru hota hai guilt, betrayal aur risky decisions ka silsila. Chaska dikhata hai ki lust sirf body ka nahi, dimaag ka bhi hota hai—and uski keemat sabko chukaani padti hai.