http://lm.i2p/nojs/knowledge/monero-atomic-swaps?dismissNotice=true
Now, since Alice can't access her BTC that she locked away, and Bob won't complete his part of the transaction, Alice just loses her money forever. Well, luckily, Bitcoin has a little technology called refund transactions, and so after a period of time, if the BTC is not claimed by Bob, the scripts have a fail-safe built in, where the BTC will automatically go back to Alice.