  Explicit Robinson-Trautman solution with minimally coupled free scalar field
is derived and analyzed. It is shown that this solution contains curvature
singularity which is initially naked but later the horizon envelopes it. We use
quasilocal horizon definition and prove its existence in later retarded times
using sub- and supersolution method combined with growth estimates. We show
that the solution is generally of algebraic type II but reduces to type D in
spherical symmetry.
