Option 1. Convince Beatrice to see Dante in his shed
After the scene in his house, Dante will ask you to convince Beatrice to meet him in his shed. Beatrice will be at Dengler's. Talk to him about her. The girl will go to the neighboring room, where you can talk to her. Tell her about Dante's suggestion, then go to the shed in the farm. You'll witness Dante lock her inside. If you healed the city, then if you visit Dante later on, he'll give you a bag of cat litter. If you go to talk to Dengler, he'll immediately attack the team.
Option 2. Convince Dante that Beatrice wants to hurt him
When Dante gives you the quest to find Beatrice (she's at Dengler's) you can convince her to go to his shed. There is, however, a better solution. Go to Virgil near the crater and talk to him (first, bring him his possum, Satan). Virgil will tell you that he and Dante were partners and you can't trust Beatrice. He'll ask you to warn Dante. You can go to him and tell him the message. Dengler and his entourage will show up and you'll have to fight them, so it's a good idea to poison his guards beforehand. After the fight, talk to Dante - you'll get Heyman hot potato - a very strong explosive that you can use, for example, to blow up the safe in the bank, if you can't open it.
Note - cooperation with Dengler is essential for this conversation - complete two quests for ghim and you'll get a task to convince Dante to tell you where his treasure is hidden. It will be a proof that Dengler and Beatrice want to rob Dante.
Virgil is an electrician and he'll offer to repair the radio tower when you complete the task. You'll be able to install a booster on it.
Applies to quests:
- Increase Guardians' broadcasting range in Los Angeles
- Keep working for Dengler and convince Dante to tell you where he hid his treasure. Dengler will arrive with his guards and they'll attack you.