At 14:18 of the second period in the Red Wings/Panthers game, Detroit requested a Coach's Challenge to review whether Nick Bjugstad interfered with Detroit goaltender Jared Coreau before the puck crossed the goal line.
The Referee determined that Bjugstad prevented Coreau from doing his job in his crease, in accordance with Rule 78.7 which states in part: "The standard for overturning the call in the event of a 'GOAL' call on the ice is that the Referee ... determines that the goal should have been disallowed due to 'Interference on the Goalkeeper,' as described in Rules 69.1, 69.3 and 69.4."

Rule 69.3 states that goals should be disallowed if "If an attacking player establishes a significant position within the goal crease, so as to obstruct the goalkeeper's vision and impair his ability to defend his goal, and a goal is scored, the goal will be disallowed."
Therefore the original call is overturned - no goal Florida Panthers.
Since the Coach's Challenge resulted in the original call being overturned, the Detroit Red Wings retain their time-out.
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Coach's Challenge
1. A team may only request a Coach's Challenge to review the following scenarios:
a) "Off-Side" Play Leading to a Goal
A play that results in a "GOAL" call on the ice where the defending team asserts that the play should have been stopped by reason of an "Off-Side" infraction by the attacking team.
b) Scoring Plays Involving Potential "Interference on the Goalkeeper"
(i) A play that results in a "GOAL" call on the ice where the defending team asserts that the goal should have been disallowed due to "Interference on the Goalkeeper," as described in Rules 69.1, 69.3 and 69.4; or
(ii) A play that results in a "NO GOAL" call on the ice despite the puck having entered the net, where the on-ice Officials have determined that the attacking team was guilty of "Interference on the Goalkeeper" but where the attacking team asserts: (i) there was no actual contact of any kind initiated by an attacking Player with the goalkeeper; or (ii) the attacking Player was pushed, shoved, or fouled by a defending Player causing the attacking Player to come into contact with the goalkeeper; or (iii) the attacking Player's positioning within the goal crease did not impair the goalkeeper's ability to defend his goal and, in fact, had no discernible impact on the play.
2. A team may only request a Coach's Challenge if they have their time-out available and the Coach's Challenge must be effectively initiated prior to the resumption of play.
3. If the Coach's Challenge does not result in the original call on the ice being overturned, the team exercising such challenge will forfeit its time-out.
4. If the Coach's Challenge does result in the call on the ice being overturned, the team successfully exercising such challenge will retain its time-out.