The concept of a power plant for fast-ignition heavy ion fusion is developed. It is based on repetitive detonation of a cylindrical direct-drive target, producing 750 MJ of fusion yield in each microexplosion. A heavy-ion driver system providing consequent compression and ignition of the cylindrical DT target is described. Data on energy fluxes generated by the microexplosion are given. The design of the thin liquid wall reactor chamber is presented. The behaviour of the liquid film at the first wall and the blanket coolant and material under a pulsed energy flux loading is analysed. The energy conversion thermal scheme and power plant output parameters are presented. The state of the art at the ITEP-TWAC experimental accelerator is described.