That is the plan in a nutshell.
in a nutshell
idiomIn summary; briefly or simply.
Origin
disputed originCalque of New Latin in nuce, derived from an anecdote in Pliny the Elder, who ascribes to Cicero the claim that the whole Iliad was once written on parchment and enclosed within a nutshell (Naturalis Historia 7.21.85). Compare typologically Czech stručný, stručně (< struk).
The manager explained the new project goals in a nutshell so everyone understood the main tasks.
To describe the complex history of the region in a nutshell, one must focus on the recurring struggle for independence.