Invises: Not quite imaginary, not always friends. They come, although they are not called, and leave without saying goodbye. Invisible partners in games, which sometimes appear in children. Unlike harmless fantasies, however, these creatures carry a real threat. They adore having fun, but their "pranks" scare those they have chosen as the target of their friendship. It is difficult to resist them, almost impossible, but weapons against them have finally been found. Now all that remains is to apply it correctly, and this is not at all easy.