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We present Zeeman-Doppler images of the active K2 star II Peg for the years2004 and 2007. The surface magnetic field was reconstructed with our new ZDIcode "iMap" which provides a full polarized radiative transfer driven inversionto simultaneously reconstruct the surface temperature and magnetic vector fielddistribution. II Peg shows a remarkable large scale magnetic field structurefor both years. The magnetic field is predominantly located at high latitudesand is arranged in active longitudes. A dramatic evolution in the magneticfield structure is visible for the two years, where a dominant and largelyunipolar field in 2004 has developed into two distinct and large scale bipolarstructures in 2007.

Zeeman-Doppler Imaging of II Peg - Magnetic field restructuring from 2004 to 2007