Friends With Seven Deadly Sins!?

A young girl ( Aka the writer. ) one day fell from the sky in the midst of a fight against a goddess. She was rescued/ saved from melodies and ban who were passing near for a quick hunt. The goddess you were fighting wasn't that strong and you could have easily defeated but something was off..? She couldn't use her sword it was like she forgot... was the goddess really that strong or did something or someone else take her powers away..? Who knows read to find out.