It is the last round of a day-long round robin. You are lying in third place, 15 VPs behind second, with only two to qualify for the KO stages on the following day. Despite only 20 VPs being available, you are playing the bottom team and the top two teams are playing each other, so a maximum win may give you a chance of qualifying.
You reach this point in the auction. So far partner has shown a 16+ point hand, 2461 distribution, and four keycards in response to the 4♠ kickback for hearts.
Another slight complication is that you are playing a junior team and the player in the same seat as you started drinking about an hour ago.
What do you call (options do include asking for the ♥Q)?
Paul

Help

North South
1♦ 1♥
1NT 2♣
2♥ 2♠
3♥ 4♠
5♣ ?