In chapter one, Peter gives us a tremendous outline for our progressive maturity in Christ (1:3-9) but this teaching and all that follows seems to be placed in the context of warning, and a call to be on guard. There is a note of alarm, as Peter warns of false teachers coming in the last days. Chapter two really sounds this theme, and chapter three appears to correct what some false teachers communicated in reference to the Second Coming of Christ.
Here is an outline for II Peter:
I. Greetings (1:1-2)
II. The development of Christian character (1:3-21)
III. The denouncement of false teachers (2:1-22)
IV. The design and confidence for the future (3:1-18)