  In this paper we present a new extended complex nonlinear Klein-Gordon
Lagrangian density, which bears a single non-topological soliton solution with
a specific rest frequency $\omega_{s}$ in $1+1$ dimensions. There is a proper
term in the new Lagrangian density, which behaves like a massless spook that
surrounds the single soliton solution and opposes any internal changes. In
other words, any arbitrary variation in the single soliton solution leads to an
increase in the total energy. Moreover, just for the single soliton solution,
the general dynamical equations are reduced to those versions of a special type
of the standard well-known complex nonlinear Klein-Gordon systems, as its
dominant dynamical equations.
