Girl and brothers get lost in the woods. Comus, a debauched man, stumbles upon the girl and tries to seduce her. She resists him by means of “right reason.”
“Stoop thy pale visage through an amber cloud,
And disinherit chaos” (334).
A brother makes the suggestion that his sister’s virtue is not in danger while she maintains “the constant mood of her calm thoughts” (371).
Milton rejects the hermeneutics of suspicion:
“Yet where an equall poise of hope and fear
Does arbitrate th’event, my nature is
That I incline to hope, rather then fear,
And gladly banish squint suspicion” (410ff).
Conclusion: The original problem is quite interesting: can virtue and right reason withstand sexual temptation? That’s not the solution, though. The solution is appealing to a fairy spirit who can come up with some herb and free the Lady. Milton’s conclusion doesn’t follow from his problem.
I think there is more to the poem than from what I’ve gleaned. I probably need to reread the secondary literature.